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The Following brands are available based on your search.

  • Cardone
    Cardone
  • Centric
    Centric
  • Mopar
    Mopar

Best Selling Genuine Jeep Brake Boosters

  • We Stock the following top leading brands, including Mopar, Cardone, Centric
  • Constantly Updated Inventory of Jeep Replacement Brake Booster Parts

We stock Brake Booster parts for most Jeep models, including Cherokee, Commander, Compass, Grand Cherokee, Liberty, Patriot, Wrangler.


Mopar
2012 Jeep Grand Cherokee Power Brake Booster Mopar

P311-39BC91E    W0133-2158023  New

Qty:
211.11
Mopar Power Brake Booster
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
Brand: Mopar
Additional Fitment Information:
Vehicle
2012 - Jeep Grand Cherokee
Cardone
2012 Jeep Grand Cherokee Power Brake Booster Cardone - w/o Master Cylinder

P311-18A080A    W0133-2158023  New

Qty:
$23.00 231.22
Cardone Power Brake Booster
  • Remanufactured
  • w/o Master Cylinder
Brand: Cardone
Additional Fitment Information:
Vehicle
2012 - Jeep Grand Cherokee
Mopar
2009 Jeep Commander Power Brake Booster Mopar

P311-2363630    W0133-1878926  New

Qty:
106.04
Mopar Power Brake Booster
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
Brand: Mopar
Additional Fitment Information:
Vehicle
2009 - Jeep Commander
Mopar
2017 Jeep Wrangler Power Brake Booster Mopar

P311-4BE5EBE    W0133-2775566  New

Qty:
239.58
Mopar Power Brake Booster
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • ; w/o Heavy Duty Brakes and w/o Engine Start/Stop System

    Remanufactured
Brand: Mopar
Additional Fitment Information:
Vehicle
2017 - Jeep Wrangler
Cardone
2000 Jeep Wrangler Power Brake Booster Cardone

P311-0A88FE5    W0133-1677333  New

Qty:
$32.00 124.71
Cardone Power Brake Booster
  • Remanufactured
Brand: Cardone
Additional Fitment Information:
Vehicle
2000 - Jeep Wrangler
Cardone
2018 Jeep Wrangler Power Brake Booster Cardone

P311-5428483    W0133-2775520  New

Qty:
$28.25 200.80
Cardone Power Brake Booster
  • ; w/o Heavy Duty Brakes and with Engine Start/Stop System
Brand: Cardone
Additional Fitment Information:
Vehicle
2018 - Jeep Wrangler
Cardone
1988 Jeep Wagoneer Power Brake Booster Cardone - Vacuum Power Brake Booster

P311-3AC21A3    54-74071  Remanufactured

83501533 , 83501534

Qty:
$25.20 74.78
Cardone Power Brake Booster
  • without Master Cylinder
  • Vacuum Power Brake Booster
  • Product Attributes:
    • Brake Booster Diaphragm Style: Single
    • Color: Gray
    • Diaphragm Diameter (in): 8.67
    • Diaphragm Diameter (mm): 220.22
    • E-Waste: No
    • Features and Benefits:
      • 100% O.e. Quality Seals, And Check Valves Are Installed On Every Unit For Like-new Performance And Reliability.
      • All Units Are 100% Tested To Ensure Reliable Performance.
      • Exclusive Rust-prohibitive Finishing Process Extends Unit Life.
      • Guaranteed Fit And Function.
      • Master Cylinder Output Rods Are Pre-adjusted (when Included) For Quick And Easy Installation.
      • Remanufactured To Match O.e. Performance.
    • First Application Year: 1985
    • Master Cylinder Included: No
    • Master Cylinder Stud Thread Size: 3/8 X 16
    • Material: Steel
    • Product Condition: Remanufactured
  • CARDONE Remanufactured Power Brake Boosters are re-engineered, built and tested to match O.E. performance. Original designs are scrutinized for potential improvement and, where applicable, design upgrades are implemented to produce a more durable part than the original. All units are 100% tested to ensure perfect fit and function.
Brand: Cardone
Additional Fitment Information:
Vehicle BrakeABS
1988 - Jeep Wagoneer Non-ABS
Cardone
1995 Jeep Cherokee Power Brake Booster Cardone - Vacuum Power Brake Booster

P311-5AF7B89    54-73152  Remanufactured

4761788

Qty:
$25.20 80.98
Cardone Power Brake Booster
  • without Master Cylinder
  • Vacuum Power Brake Booster
  • Product Attributes:
    • Brake Booster Diaphragm Style: Dual
    • Color: Gray
    • Diaphragm Diameter (in): 8.85
    • Diaphragm Diameter (mm): 224.79
    • E-Waste: No
    • Features and Benefits:
      • 100% O.e. Quality Seals, And Check Valves Are Installed On Every Unit For Like-new Performance And Reliability.
      • All Units Are 100% Tested To Ensure Reliable Performance.
      • Exclusive Rust-prohibitive Finishing Process Extends Unit Life.
      • Guaranteed Fit And Function.
      • Master Cylinder Output Rods Are Pre-adjusted (when Included) For Quick And Easy Installation.
      • Remanufactured To Match O.e. Performance.
    • First Application Year: 1995
    • Master Cylinder Included: No
    • Master Cylinder Stud Thread Size: M8 X 1.25
    • Material: Steel
    • Product Condition: Remanufactured
  • CARDONE Remanufactured Power Brake Boosters are re-engineered, built and tested to match O.E. performance. Original designs are scrutinized for potential improvement and, where applicable, design upgrades are implemented to produce a more durable part than the original. All units are 100% tested to ensure perfect fit and function.
Brand: Cardone
Additional Fitment Information:
Vehicle
1995 - Jeep Cherokee
Cardone
1991 Jeep Comanche Power Brake Booster Cardone - Vacuum Power Brake Booster

P311-5F35EE3    54-74074  Remanufactured

4637769

Qty:
$31.50 110.46
Cardone Power Brake Booster
  • without Master Cylinder
  • Vacuum Power Brake Booster
  • Product Attributes:
    • Brake Booster Diaphragm Style: Single
    • Color: Gray
    • Diaphragm Diameter (in): 8.73
    • Diaphragm Diameter (mm): 221.74
    • E-Waste: No
    • Features and Benefits:
      • 100% O.e. Quality Seals, And Check Valves Are Installed On Every Unit For Like-new Performance And Reliability.
      • All Units Are 100% Tested To Ensure Reliable Performance.
      • Exclusive Rust-prohibitive Finishing Process Extends Unit Life.
      • Guaranteed Fit And Function.
      • Master Cylinder Output Rods Are Pre-adjusted (when Included) For Quick And Easy Installation.
      • Remanufactured To Match O.e. Performance.
    • First Application Year: 1991
    • Master Cylinder Included: No
    • Master Cylinder Stud Thread Size: 3/8 X 16
    • Material: Steel
    • Product Condition: Remanufactured
  • CARDONE Remanufactured Power Brake Boosters are re-engineered, built and tested to match O.E. performance. Original designs are scrutinized for potential improvement and, where applicable, design upgrades are implemented to produce a more durable part than the original. All units are 100% tested to ensure perfect fit and function.
Brand: Cardone
Additional Fitment Information:
Vehicle BrakeABS
1991 - Jeep Comanche Non-ABS
Cardone
2000 Jeep Cherokee Power Brake Booster Cardone - Vacuum Power Brake Booster

P311-3126079    54-73154  Remanufactured

4856672 , 4856672AB , 4856672AC

Qty:
$16.20 86.53
Cardone Power Brake Booster
  • without Master Cylinder
  • Vacuum Power Brake Booster
  • Product Attributes:
    • Brake Booster Diaphragm Style: Dual
    • Color: Gray
    • Diaphragm Diameter (in): 8.85
    • Diaphragm Diameter (mm): 224.79
    • E-Waste: No
    • Features and Benefits:
      • 100% O.e. Quality Seals, And Check Valves Are Installed On Every Unit For Like-new Performance And Reliability.
      • All Units Are 100% Tested To Ensure Reliable Performance.
      • Exclusive Rust-prohibitive Finishing Process Extends Unit Life.
      • Guaranteed Fit And Function.
      • Master Cylinder Output Rods Are Pre-adjusted (when Included) For Quick And Easy Installation.
      • Remanufactured To Match O.e. Performance.
    • First Application Year: 1997
    • Master Cylinder Included: No
    • Master Cylinder Stud Thread Size: M8 X 1.25
    • Material: Steel
    • Product Condition: Remanufactured
  • CARDONE Remanufactured Power Brake Boosters are re-engineered, built and tested to match O.E. performance. Original designs are scrutinized for potential improvement and, where applicable, design upgrades are implemented to produce a more durable part than the original. All units are 100% tested to ensure perfect fit and function.
Brand: Cardone
Additional Fitment Information:
Vehicle Fuel Type
2000 - Jeep Cherokee GAS
Cardone
1993 Jeep Grand Cherokee Power Brake Booster Cardone - Vacuum Power Brake Booster

P311-4DC64F8    54-73191  Remanufactured

4762163 , 4720868

Qty:
$25.20 72.02
Cardone Power Brake Booster
  • without Master Cylinder
  • Vacuum Power Brake Booster
  • Product Attributes:
    • Brake Booster Diaphragm Style: Dual
    • Color: Gray
    • Diaphragm Diameter (in): 8.84
    • Diaphragm Diameter (mm): 224.49
    • E-Waste: No
    • Features and Benefits:
      • 100% O.e. Quality Seals, And Check Valves Are Installed On Every Unit For Like-new Performance And Reliability.
      • All Units Are 100% Tested To Ensure Reliable Performance.
      • Exclusive Rust-prohibitive Finishing Process Extends Unit Life.
      • Guaranteed Fit And Function.
      • Master Cylinder Output Rods Are Pre-adjusted (when Included) For Quick And Easy Installation.
      • Remanufactured To Match O.e. Performance.
    • First Application Year: 1993
    • Master Cylinder Included: No
    • Master Cylinder Stud Thread Size: M8 X 1.25
    • Material: Steel
    • Product Condition: Remanufactured
  • CARDONE Remanufactured Power Brake Boosters are re-engineered, built and tested to match O.E. performance. Original designs are scrutinized for potential improvement and, where applicable, design upgrades are implemented to produce a more durable part than the original. All units are 100% tested to ensure perfect fit and function.
Brand: Cardone
Additional Fitment Information:
Vehicle
1993 - Jeep Grand Cherokee
Cardone
2001 Jeep Grand Cherokee Power Brake Booster Cardone - Vacuum Power Brake Booster

P311-333FA72    54-73163  Remanufactured

5011261AA , 05011261AA , 5011261AB

Qty:
$47.70 117.41
Cardone Power Brake Booster
  • without Master Cylinder
  • Vacuum Power Brake Booster
  • Product Attributes:
    • Brake Booster Diaphragm Style: Dual
    • Color: Gray
    • Diaphragm Diameter (in): 8.84
    • Diaphragm Diameter (mm): 224.41
    • E-Waste: No
    • Features and Benefits:
      • 100% O.e. Quality Seals, And Check Valves Are Installed On Every Unit For Like-new Performance And Reliability.
      • All Units Are 100% Tested To Ensure Reliable Performance.
      • Exclusive Rust-prohibitive Finishing Process Extends Unit Life.
      • Guaranteed Fit And Function.
      • Master Cylinder Output Rods Are Pre-adjusted (when Included) For Quick And Easy Installation.
      • Remanufactured To Match O.e. Performance.
    • First Application Year: 1999
    • Master Cylinder Included: No
    • Master Cylinder Stud Thread Size: M8 X 1.25
    • Material: Steel
    • Product Condition: Remanufactured
  • CARDONE Remanufactured Power Brake Boosters are re-engineered, built and tested to match O.E. performance. Original designs are scrutinized for potential improvement and, where applicable, design upgrades are implemented to produce a more durable part than the original. All units are 100% tested to ensure perfect fit and function.
Brand: Cardone
Additional Fitment Information:
Vehicle
2001 - Jeep Grand Cherokee
Cardone
1997 Jeep Grand Cherokee Power Brake Booster Cardone - Vacuum Power Brake Booster

P311-227B970    54-73151  Remanufactured

4761786

Qty:
$41.40 57.60
Cardone Power Brake Booster
  • without Master Cylinder
  • Vacuum Power Brake Booster
  • Product Attributes:
    • Brake Booster Diaphragm Style: Dual
    • Color: Gray
    • Diaphragm Diameter (in): 8.85
    • Diaphragm Diameter (mm): 224.79
    • E-Waste: No
    • Features and Benefits:
      • 100% O.e. Quality Seals, And Check Valves Are Installed On Every Unit For Like-new Performance And Reliability.
      • All Units Are 100% Tested To Ensure Reliable Performance.
      • Exclusive Rust-prohibitive Finishing Process Extends Unit Life.
      • Guaranteed Fit And Function.
      • Master Cylinder Output Rods Are Pre-adjusted (when Included) For Quick And Easy Installation.
      • Remanufactured To Match O.e. Performance.
    • First Application Year: 1995
    • Master Cylinder Included: No
    • Master Cylinder Stud Thread Size: M8 X 1.25
    • Material: Steel
    • Product Condition: Remanufactured
  • CARDONE Remanufactured Power Brake Boosters are re-engineered, built and tested to match O.E. performance. Original designs are scrutinized for potential improvement and, where applicable, design upgrades are implemented to produce a more durable part than the original. All units are 100% tested to ensure perfect fit and function.
Brand: Cardone
Additional Fitment Information:
Vehicle
1997 - Jeep Grand Cherokee
Cardone
1993 Jeep Grand Wagoneer Power Brake Booster Cardone - Power Brake Booster

P311-0C61A9B    50-3191  Remanufactured

4720868 , 4713076

Qty:
$27.00 129.98
Cardone Power Brake Booster
  • with Vacuum Booster with Master Cylinder
  • Power Brake Booster
  • Product Attributes:
    • Brake Booster Diaphragm Style: Dual Diaphragm
    • Color: Gray
    • Diaphragm Diameter: 8.838"
    • E-Waste: No
    • Features and Benefits:
      • 100% O.e. Quality Seals, And Check Valves Are Installed On Every Unit For Like-new Performance And Reliability.
      • All Units Are 100% Tested To Ensure Reliable Performance.
      • Exclusive Rust-prohibitive Finishing Process Extends Unit Life.
      • Guaranteed Fit And Function.
      • Master Cylinder Output Rods Are Pre-adjusted (when Included) For Quick And Easy Installation.
      • Remanufactured To Match O.e. Performance.
    • First Application Year: 1993
    • Master Cylinder Included: Yes
    • Material: Steel
    • Product Condition: Remanufactured
  • CARDONE Remanufactured Power Brake Boosters are re-engineered, built and tested to match O.E. performance. Original designs are scrutinized for potential improvement and, where applicable, design upgrades are implemented to produce a more durable part than the original. All units are 100% tested to ensure perfect fit and function.
Brand: Cardone
Additional Fitment Information:
Vehicle
1993 - Jeep Grand Wagoneer
Cardone
2006 Jeep Liberty Power Brake Booster Cardone - Vacuum Power Brake Booster

P311-4258053    54-72903  Remanufactured

5134120AA , 5072521AA

Qty:
$21.60 89.13
Cardone Power Brake Booster
  • without Master Cylinder
  • Vacuum Power Brake Booster
  • Product Attributes:
    • Brake Booster Diaphragm Style: Dual
    • Color: Gray
    • Diaphragm Diameter (in): 9.56
    • Diaphragm Diameter (mm): 242.82
    • E-Waste: No
    • Features and Benefits:
      • 100% O.e. Quality Seals, And Check Valves Are Installed On Every Unit For Like-new Performance And Reliability.
      • All Units Are 100% Tested To Ensure Reliable Performance.
      • Exclusive Rust-prohibitive Finishing Process Extends Unit Life.
      • Guaranteed Fit And Function.
      • Master Cylinder Output Rods Are Pre-adjusted (when Included) For Quick And Easy Installation.
      • Remanufactured To Match O.e. Performance.
    • First Application Year: 2002
    • Master Cylinder Included: No
    • Master Cylinder Stud Thread Size: M8 X 1.25
    • Material: Steel
    • Product Condition: Remanufactured
  • CARDONE Remanufactured Power Brake Boosters are re-engineered, built and tested to match O.E. performance. Original designs are scrutinized for potential improvement and, where applicable, design upgrades are implemented to produce a more durable part than the original. All units are 100% tested to ensure perfect fit and function.
Brand: Cardone
Additional Fitment Information:
Vehicle
2006 - Jeep Liberty
Cardone
2003 Jeep TJ Power Brake Booster Cardone - Vacuum Power Brake Booster

P311-04EC159    54-73198  Remanufactured

04798158AC , 4798158AB , 4798158 , 4798158AC

Qty:
$31.50 83.50
Cardone Power Brake Booster
  • without Master Cylinder
  • Vacuum Power Brake Booster
  • Product Attributes:
    • Brake Booster Diaphragm Style: Dual
    • Color: Gray
    • Diaphragm Diameter (in): 8.85
    • Diaphragm Diameter (mm): 224.79
    • E-Waste: No
    • Features and Benefits:
      • 100% O.e. Quality Seals, And Check Valves Are Installed On Every Unit For Like-new Performance And Reliability.
      • All Units Are 100% Tested To Ensure Reliable Performance.
      • Exclusive Rust-prohibitive Finishing Process Extends Unit Life.
      • Guaranteed Fit And Function.
      • Master Cylinder Output Rods Are Pre-adjusted (when Included) For Quick And Easy Installation.
      • Remanufactured To Match O.e. Performance.
    • First Application Year: 1997
    • Master Cylinder Included: No
    • Master Cylinder Stud Thread Size: M8 X 1.25
    • Material: Steel
    • Product Condition: Remanufactured
  • CARDONE Remanufactured Power Brake Boosters are re-engineered, built and tested to match O.E. performance. Original designs are scrutinized for potential improvement and, where applicable, design upgrades are implemented to produce a more durable part than the original. All units are 100% tested to ensure perfect fit and function.
Brand: Cardone
Additional Fitment Information:
Vehicle
2003 - Jeep TJ
Cardone
1993 Jeep Wrangler Power Brake Booster Cardone - Vacuum Power Brake Booster

P311-16EABDC    54-74075  Remanufactured

4637862

Qty:
$35.10 71.18
Cardone Power Brake Booster
  • without Master Cylinder
  • Vacuum Power Brake Booster
  • Product Attributes:
    • Brake Booster Diaphragm Style: Single
    • Color: Gray
    • Diaphragm Diameter (in): 8.73
    • Diaphragm Diameter (mm): 221.62
    • E-Waste: No
    • Features and Benefits:
      • 100% O.e. Quality Seals, And Check Valves Are Installed On Every Unit For Like-new Performance And Reliability.
      • All Units Are 100% Tested To Ensure Reliable Performance.
      • Exclusive Rust-prohibitive Finishing Process Extends Unit Life.
      • Guaranteed Fit And Function.
      • Master Cylinder Output Rods Are Pre-adjusted (when Included) For Quick And Easy Installation.
      • Remanufactured To Match O.e. Performance.
    • First Application Year: 1991
    • Master Cylinder Included: No
    • Master Cylinder Stud Thread Size: 3/8 X 16
    • Material: Steel
    • Product Condition: Remanufactured
  • CARDONE Remanufactured Power Brake Boosters are re-engineered, built and tested to match O.E. performance. Original designs are scrutinized for potential improvement and, where applicable, design upgrades are implemented to produce a more durable part than the original. All units are 100% tested to ensure perfect fit and function.
Brand: Cardone
Additional Fitment Information:
Vehicle BrakeABS
1993 - Jeep Wrangler Non-ABS
Centric
1967 Jeep Jeepster Power Brake Booster Centric - Centric Power Brake Boosters

P311-595D761    160.80319  Remanufactured

Qty:
$94.00 160.40
Centric Power Brake Booster
  • Centric Power Brake Booster
  • ; 6 1/2" Thickness
  • Most complete aftermarket booster program with over 1;000 applications cataloged; Includes both vacuum and hydraulic units; Each booster is completely inspected; rebuilt and tested to ensure proper fit and function
  • Centric Power Brake Boosters
  • Product Attributes:
    • Attribute ID (Type): California Proposition 65
    • Booster Type: Vacuum
    • Brake Pedal Rod Extension Included: No
  • Centric Parts full line of remanufactured brake boosters includes both vacuum and hydraulic units. Each booster is completely inspected; rebuilt and tested to ensure proper fit and function. With over 1;000 applications cataloged; Centric's booster program is the most complete in the aftermarket.
Brand: Centric
Additional Fitment Information:
Vehicle
1967 - Jeep Jeepster
Centric
2004 Jeep Grand Cherokee Power Brake Booster Centric - Centric Power Brake Boosters

P311-336D762    160.80258  Remanufactured

Qty:
$62.00 136.02
Centric Power Brake Booster
  • Centric Power Brake Booster
  • Most complete aftermarket booster program with over 1;000 applications cataloged; Includes both vacuum and hydraulic units; Each booster is completely inspected; rebuilt and tested to ensure proper fit and function
  • Centric Power Brake Boosters
  • Product Attributes:
    • Attribute ID (Type): California Proposition 65
    • Booster Type: Vacuum
    • Brake Pedal Rod Extension Included: No
  • Centric Parts full line of remanufactured brake boosters includes both vacuum and hydraulic units. Each booster is completely inspected; rebuilt and tested to ensure proper fit and function. With over 1;000 applications cataloged; Centric's booster program is the most complete in the aftermarket.
Brand: Centric
Additional Fitment Information:
Vehicle
2004 - Jeep Grand Cherokee

Latest Car Advice

CarJunky AutoAdvice

brakes

Showing 4 out of 12 Posts | Show 8 Hidden Posts
Question From joe32 on brakes

2001 jeep cherokee popped vacuum line off manifold,put it back on, now brakes are super stiff. Bleed the lines still no change.

Response From Hammer Time

Sounds like you somehow lost the vacuum supply to the booster in this process.

Response From joe32

Any way to get it back?

Response From Discretesignals Top Rated Answer

Of course there is a way to get it back, but you have to find out if you have engine vacuum at the brake booster check valve first. Lines usually don't pop off for no reason.

Response From joe32

When its running I put my finger over the valve it sucks air.

Response From Discretesignals

Did you take the valve out of the brake booster and check for vaccum at the end of the valve with the hose still connected to it? The engine has to be running of course.

Response From joe32

No

Response From Discretesignals

So you pulled the big hose off the check valve and it sucked on your finger?

Response From joe32

Just letting you know I replaced the check valve that fixed it. Thanks.

Response From Tom Greenleaf

Glad it's fixed and that easy really. Will close as solved. Can be opened by any moderator upon request,

T

Response From Discretesignals

You popped the line off or did it fall off from a backfire or something?

Have you checked for engine vacuum at the brake booster check valve?

Response From joe32

It didn't back fire, it was strange, the defrost was on from the night before other than that nothing.

97 Jeep Grand Cherokee Laredo bogs down/won't gas forward until it is shut off and restarted after 10 minutes

Showing 4 out of 4 Posts
Question From MattLobo on 97 Jeep Grand Cherokee Laredo bogs down/won't gas forward until it is shut off and restarted after 10 minutes

I have a 1997 Jeep Grand Cherokee Laredo 4x4 with a 4.0L 6 cylinder motor and auto transmission. It has 98,000 miles on it.

I'm having a problem with it suddenly not wanting to go forward while driving it, after 20-30 minutes or around 4-7 miles of driving. It stays
running/idling(sometimes barely), but when you press the gas, it sputters and starts to die until you let up on the gas pedal. It will only move forward at about 1 or 2 miles per hour(on flat ground), or won't move forward at all.

I can get it to start working normal(it feels like it's running at 95% normal), if I shut it off and let it sit for 5 thru 10 minutes. Then I start it
up again, and it will usually work again(until it heats back up?). While this goes on, the oil pressure is normal, as is the engine/radiator heat level.
All cylinders sound like they are firing right, and it doesn't put out any smoke.
My injectors aren't leaking either.
I do hear a hissing sound coming from the brake booster areas for around 30 seconds when the problem starts up again, but it disappears after I stop
and restart the engine.

I live in an area around 4000 ft above sea level in a Costa Rica mountain area, and the temperature is always between 60F-78F. this area is where I am
experiencing this problem with my Jeep.The nationwide gasoline suppliers do sometimes have batches of dirty gas. Some folks get problems with their fuel
systems because of this.
I was told my fuel filter might be dirty, or the fuel pump was getting ready to give out, but the fuel pump was replaced 4 years ago at the Jeep dealer,
and I only have put around 25,000 miles on it. Any fuel filter or fuel pump will have to be ordered from the US.
I'm thinking it might be something electrical or a problem with the brake booster(but I'm probably wrong). I do sometimes get soft brake pedal pressure off and on.

Any ideas?

Response From Tom Greenleaf

For now concentrate on the booster, vacuum line to it and a check valve. Careful but you could plug it off tight and see if engine runs properly but you would have seriously compromised brakes to test drive it that way so will default to saying don't but a test while still if part of diagnosing could be done.

Gas issues where you are? IDK and couldn't. If that common and known would make me want to get fuel in gas cans and filter it thru a pump before putting it in vehicle.........

T

Response From MattLobo

I just read on Jeep forums that some of the symptoms of the problem I'm having with my Jeep GC Laredo, have been known to be caused by faulty crank position sensors or crankshaft position sensors. Sensor problems seem to be common for Grand Cherokees.

I think it's time for a new brake booster(due to slightly fluctuating brake pedal pressure), but I don't see how it would cause my car to bog out down to idle after driving for a while, and then start working again after being shut off for 5 or 10 minutes. I'm going to ask my mechanic to try your solution for checking the brake booster, just in case.

The gas problem where I'm at(Costa Rica) isn't as much sediment or actual dirt in the gas, as it is from a chemical additive that seems to be in certain batches of gas, which tends to leave residues that build up and mess with fuel filters/pumps/injectors.

Thank you for your prompt reply, and let me know if you have any more ideas on what might be the cause of this problem.

Response From Tom Greenleaf Top Rated Answer

The fluctuating brake performance when solved is about certainly vacuum issues. In turn that will cause misinformation for how the engine should behave with assorted symptoms. It should have set a code or one pending by now and not sure if you can get that read so you don't waste more time and $$ guessing IF just taking care of the vacuum leak highly suspected takes care of it.

Fuel + additives: There are countless formulations for assorted reasons. Use of ethanol does suspend dirt and will mean more frequent fuel filter changing. Days of the fuel station filtering it before you buy it are about over. A favorite preventative solvent that seems to really help is called Techron if you can find that I approve its use for prevention of fuel gumming problems. Once a real problem has occurred it would probably take cleaning out the system by machine that may or may not be available near you??

Again - I'd tend to the issue causing the brakes first then if that is found and fixed if problems still exist chase them down,

T

My 1991 Jeep Cherokee Laredo

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Question From Guest on My 1991 Jeep Cherokee Laredo

Hey There, I have 91' jeep cherokee and its in pretty good shape but does have some problems. I have some auestions and am wondering if you guys can either give me some tips or lead me in the right direction.. Here we go..

First off ill go with my brakes..

- When i stop i here a hissing noise and its really hard for me to stop the vehicle, I need to press really hard onto the pedal inorder for it to stop???

Next My Axle, or if it is?.........

- While im driving around 50-65 Mph, I here a deep humming noise in the back and if im going around a bend and have to turn the wheel right, the humming gets worse, but anyother driving under those speeds i dont here it???

Finally My engine..

- My jeep is a 4.0 Straight or inline six with 273,353 Mile. It accels really good, Believe me my friend in his honda said so!! But the problem is that the thing sounds really ugly, like a Deisel but louder, Whats The Deal With That?????

Thanks to all who answer or who even read this rather long message!!!

Response From Guest

Forgot to give the Specs.

- 1991
- Jeep Cherokee Laredo 4WD
- inline six, 4.0 liter
- 273,353 Mile on it
- Has had only one other owner, and has never left the state of NC.

Response From Double J

I'll venture a guess here....(all I can do without hearing it)

Brakes....Sounds like a faulty brake vacuum booster or maybe the vacuum hose to it came off or is leaking

Axle noise?...sounds like it could be an axle bearing

Engine....worn out..basically...sounds like lifter noise.....
Try adding an additive to the oil,change the oil and in place of a quart add a quart of "Risolone"...may help,may not.
Does have high mileage on this

Thats my thoughts

Response From Jeepgoinfast

Thanks, Yea I had called a friend and he had mentioned something about the Booster, Sounds expensive but ill check it out if its leaking or not...

and im not sure if its the axle or not but it make some pretty bad humming toward the back of my car.

And for the engine ill give that a try, Is that the name of the product, or the manufacture?

Thanks for your reply!!!

Response From Double J

Name of the product..

I use it a lot..have had some good results....don't know if it will help in this case or not....can't hurt...
Worth a try...costs more than a quart of oil tho...like $4.00 or more..

Response From Jeepgoinfast

That doesnt sound that bad, 4.00 is nothing compared to an engine fix.. But thanks for your Suggestions and tips!!!

Response From Guest Top Rated Answer

Well I Got the Brakes Fixed, it was exactely what you had Said it was the Brake Booster, And Im going to have the back end looked at, other than that i changed my oil and put the Oil additive into the engine in place of the exrta quart, and am hearing some improvements...Thanks A Bunch!!!!!

Response From Jeepgoinfast

Who Are u??? Can Someone find out who this person is cuz I haven't gotten my car looked at yet. But i Have Gotten My oil changed and added the Risoline Additive.. Can This Guest Give Me An Explaination for him/her butting into my thread like they were me????

Response From way2old

Hello JeepGoingFast. Whoever posted as Guest posted their responses from the same computer you use. So who is the Guest??????

Response From Guest

you may want to check the exhaust manifold if your cherokee sounds like a diesel. i have the same exact jeep with the same amount of miles and it sounds pretty loud. my mechanic told me there was a crack in my manifold. im replacing it this week, so i ll let you know if thats the prob[

Response From Jeepgoinfast

Sorry Bout that, My Friend wrote that he was being a prick, I thought someone else wrote it... anyway if you could just delete those Messages That would be cool.. Thanks

Trans shuttering (slipping in & out of gear) when coming to a Stop

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Question From Sparkles on Trans shuttering (slipping in & out of gear) when coming to a Stop

I have a 2003 Jeep Liberty a when I applying the brakes with a the engine revving at 1000 rpm or a little lower (a slight torque stall). Can feel the clutches disengaging & re-engaging very rapidly until the vehicle comes to a complete stop; should say the disengaging & re-engaging slows down with the vehicle when it slows down. Any ideas??
And it's not the brakes doing it either!!!

Response From kev2

Sparkles let us know if you are still following this thread-
I am seeing different descriptions - terms and verbs I guess

Response From Sparkles

Sparkles let us know if you are still following this thread-
I am seeing different descriptions - terms and verbs I guess
Yep still following this thread

Response From kev2

I can not describe the issue SO when I see9ng things close to your description...


always talking about speed 30-40 mph....not rpm- yes no?
a feeling like driving over 'rumble strips'....
described as the TCC on off a surging as vehicle slows...


hoping it is simple I would ask - have you serviced trans ? only ATF4 I think?
tried lube guard for this TCC issue?


GTG LATER

Response From gsferraro

I would like to know what the cvi value is for the low/reverse clutch, to eliminate it or to see if that could be your problem. Anytime i scanning or diagnosing a problem with the jeep or chrysler transmissions i always look at and record the cvi values. Gary

Sorry for the delayed response, shop is crazy busy so my day starts at 330am

Response From Sparkles

K Gary, at the moment I'm at work for another 10 days (I work away from home), but as soon as I get home I'll get the CVI value on the Low/Reverse Clutch & others too. Post the results as soon as I can.

Response From gsferraro

ok sounds good

Response From Tom Greenleaf Top Rated Answer

Not sure what you mean by clutches engaging and re-engaging? Seems more like a torque converter lock up issue.


I'll just suggest a couple things and leave this to this sites transmission specialist. Check for vacuum leaks especially to brake booster in this case as low vacuum will signal higher load on engine confusing signals to the operation of engine and trans.


You could get codes read in full and post the #s to speed up suggestions,


T

Response From Sparkles

I didn't mention this in scenario my earlier post; when your backing up on a slight incline, like a driveway. For example: I was turning around on a field approach (driveway to a field) and there was a slight decline to it from off the highway; so, I was backing up very slowing, and it does then too. It's like the going in & out of Reverse (clutches disengaging & re-engaging). It's like it felt like one of the tires were spinning in a very small puddle of mud, but they weren't.
Doesn't the Trans Fault Codes not turn on the Check Engine light? As far as Codes; the only one there when I read it was a EVAP code.

Response From Tom Greenleaf

OK, Quote your whole first post again ">>I have a 2003 Jeep Liberty a when I applying the brakes with a the engine revving at 1000 rpm or a little lower (a slight torque stall). Can feel the clutches disengaging & re-engaging very rapidly until the vehicle comes to a complete stop; should say the disengaging & re-engaging slows down with the vehicle when it slows down. Any ideas??
And it's not the brakes doing it either!!!"
This begs questions and descriptions do.
Back up here some: Is trans fluid filled to proper level? I ask that now but should be first thing checked. On a slope now you said it can act up. I don't care too much what surface unless you are slipping just that it's a slope. Any vehicle if driven thru high water or muck factor that.


* Trans codes and other codes don't always show up with the CEL light staying lit until it's been there long enough. Better code readings will expose codes pending. Try again with a better machine or any to begin with free at some parts outlets and other places but get #s as said not an interpretation or what to buy!


* Why is idle @ 1,000 RPM? Did you mean you are holding throttle there? If not a vacuum leak could do that or unmetered air entering intake that is interpreted by engine and transmission controls to adjust fuel delivery, spark timing, what gear to be in, when to up and down shift, when to engage torque converter lock or unlock up, and tons more also calculating in your requests driving it with a gas and brake pedal, which gear chosen and also how fast you are going. Whew - that and more in a nano second.
So, I thought of vacuum leak because of what looked like a high idle not said if you did that or that was just the speed of engine messing up all those other things. Low vacuum by leak or load on an engine can and will dictate what it should do like idle and when to lock up a converter. Low vacuum in manifold will be seen as a load as if you are requesting more power whether you are or not with a leak.


Other still real important is the trans guy isn't here yet. So far trans may not be the issue at all to me. Some will shudder if slipping for real like a rapid fire feel like brakes on and off but at trans for traction. Some GMs used a button to shut that off I think marked T/C for "traction control" as it was annoying to many folks especially in certain slippery situation they otherwise understood like snow and ice common to many area in that time of year.


Other again: Off dry common paved level roads you can slip and not realize it. I drive vehicles too. Plain wet grassy anything it's easy without wild slopes or force. Certain vehicles especially with applying brakes will take ONE spinning or locked wheel as a problem and activate ABS or traction controls to help or so it thinks and could be normal.


Still question why the RPMs so high - it matters,


T

Response From gsferraro

Hello,
First thing is check fluid level, engine running in neutral. It almost sounds like the converter is not releasing but im not sure thats what it is. How does this car drive foward? Does this problem only happen when hot? Trans codes will turn on the check engine light. Was anything done to this jeep before this problem started

Response From kev2

always scan....do not rely on bulb.
recent work- anything could be a clue.

Response From Sparkles

Don't want sound like an Asshole; I am a JM/RS HD Mechanic; oil level was First thing I checked; secondly in previous post it shuttered "like it was in a small mud puddle", and the approach was gravelled.

This vehicle doesn't have TRC, just ABS and it's not that.

Heavy gear do have automatic transmissions too, but they're engineered a little different then the Automotive industry.

My first thought was the Torque Lock Up; but it has lots power torque off the start, so it kind of ruled that thought out of mind; second was a Speed Sensor, but I'm a I little unfimilair with Automotive engineering of transmission.

And asking why the engine revving at a 1000rpm; and why am I resting my foot on the accelerator pedal. The first it did it I didn't realize that I had my foot resting on the pedal, and when it shuttered I noticed it right way and said to my wife something very wrong with this vehicle, I tryed to duplicate the seneraio, and I couldn't till one day we were liking at somebody's RV that they were selling on the side of their driveway (these people lived off a major highway and turning around on their yard the thought was just to back up onto the shoulder instead and this is when I noticed it again for the second time. But now I've been able to figure out to make it act up by holding accelerator pedal just below or at a 1000rpm. And what I also found is when the vehicle is at Operating Temperature is when I make it happen, when every thing is Cold, it don't do it.
I did have it read for codes at local garage and nothing showed up. I also have a Scanner as well and it don't show anything relating to Transmission codes; just the EVAP code, which I think it's my fuel cap (oh by the way if this makes a difference to you guys, this vehicle is a gas job). In my 25+ years of wrenching, there are times where Sensors and other fault don't register in the ECM as a fault.
K, I realize I may have forgotten to mention more stuff, but the mind is a little tapped out at the moment. But any other questions, keeping on asking them and try my best to answer them.

Oh forgot answer buddy question; this vehicle is stock. And we bought it a little over a year ago, and we bought with a Lubrico Warranty program and had it in the shop several times (about 5 times) relating to this issue and nobody seems to know why it does this. So I'm taking it on myself to figure it out (with your guys help too).

Response From Discretesignals

My first thought was the Torque Lock Up; but it has lots power torque off the start, so it kind of ruled that thought out of mind

Just to add: The torque converter on modern vehicles have a clutch that mechanically engages the engine to the transmission. They engineered it that way to reduce transmission fluid temperature and to increase fuel mileage. A converter without a clutch is going to have slippage between the impeller and the turbine that creates heat. By locking the turbine to the impeller mechanically you eliminate that.

The torque converter clutch should only be applied at steady cruising speed, usually in 3rd or OD gears. If the torque converter clutch stays engaged, for some reason, while your coming to a stop, it can cause shuddering or even stall the engine out. A torque converter clutch that doesn't disengage when coming to a stop would act the same as a manual transmission coming to a stop without disengaging the clutch disc.

Response From Sparkles

: The torque converter on modern vehicles have a clutch that mechanically engages the engine to the transmission. They engineered it that way to reduce transmission fluid temperature and to increase fuel mileage. A converter without a clutch is going to have slippage between the impeller and the turbine that creates heat. By locking the turbine to the impeller mechanically you eliminate that.

K, in the Heavy world they called it a "Torque Lock Up" they use it for the same reasons, it's like a calling it an Overdrive.
So if the clutch doesn't disengage properly, you lose all your Torque (push power from a dead stop). And also if stays engaged (locked up) the transmission & torque temperature increases very quickly from it trying to push itself ahead. In the Automotive world you'd smell hot oil, and possibly pushing oil out the transmission vent, correct; in the Heavy world you got gauges in the cab and sensors throwing High Temp codes.
K, back to your post I understand what you mean by the shuddering from the torque; but would this do it even if your on even ground start driving forward or reverse very slowly then?

Response From Discretesignals

Not sure if a torque converter clutch is used the same way in the heavy equipment industry, but the torque converter clutch in automobile doesn't multiply torque or cause the transmission fluid temperature to increase if it stays engaged. By mechanically coupling the turbine to the engine, with a clutch device, you eliminate that loss of energy(heat).

All the clutch does is lock the engine to the transmission just like when you lock the engine to the transmission on a manual transmission equipped vehicle when you release the clutch pedal. The turbine in the torque converter doesn't spin at the same speed as the impeller and because of this the energy that is lost comes in the form of heat.

The clutch can't be engaged when you come to a stop because the turbine slows down and stops and the clutch is mechanically connected to the turbine. If the clutch is engaged to the housing which is driven by the engine, the engine will stall out when the turbine speed gets too low.

Here is an illustrated parts break down of the 42rle, but it really won't help you much because you need to have it diagnosed to figure out if you have some sort of electrical or mechanical issue. Gary is the guru on that.



Eric does a great job of explaining the operation of a torque converter and it components...check it out:

Response From gsferraro

Hello,
Ok, so since it happens hot and not cold, you may have a pressure loss when the trans heats up, or maybe an issue with the valvebody. This unit is called 42RLE, You mentioned that you had this at a shop a few times, do you know if they happen to look at C.V.I (clutch volume index) values, these numbers show internal wear.

Response From Sparkles

Ok, so since it happens hot and not cold, you may have a pressure loss when the trans heats up, or maybe an issue with the valvebody. This unit is called 42RLE, You mentioned that you had this at a shop a few times, do you know if they happen to look at C.V.I (clutch volume index) values, these numbers show internal wear.

42RLE is the model of the transmission I have in this Jeep?
No I never saw the C.V.I. values, they did give me a print out of what was there for codes though.

Response From Sparkles

Oh ya, did forget to mention that the local garage mechanic did change out the TPS; when I went to pick the Jeep and they told me what they had done, I thought, Ok, I could see this might have been the issue. But, NOPE it still continues to do the samething, problem still exists.

Does anyone know where I could get my hands on a Parts Break Down (or a Parts Manual) on this transmission/torque, free one I prefer?

1988 Jeep Wrangler w/2001 2.5L and bellhousing clutch slave problem

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Question From loc4xchamp on 1988 Jeep Wrangler w/2001 2.5L and bellhousing clutch slave problem

I have a 1988 Jeep Wrangler with a 2001 2.5L motor and bellhousing installed, my clutch master cylinder(MC) is a 1988 and my clutch slave(CS) is a 2001, it's connected with a coupling on the line going from the MC to the CS. A new complete kit will not work because of the MC. A new CS will not work because there isn't a line made to connect to the 88 MC.
My clutch will last about a week then I must pull the CS from the bellhousing and pump the rod about twenty times. The CS does not have a bleeder on it and I can't find any fluid leaks on either the MC, line, or CS. I'm getting air in the system some how? It's getting to be a pain in the @$$ doing it once a week.
My question is this, does anyone make a line that will mount to the 1988 MC then go into a new 2001 model CS? A new complete kit comes with the line already connected (it's plastic) and a new MC for a 2001 model will not mount on the firewall. At least a picture of the two look way different. If I change out the bellhousing I will have to pull the motor, right? I will also have to purchase a bellhousing for a 1988 since I no longer have the old one.

Response From DanD

I’m not really sure what to say with this; you mite be able to add a tee at the connection between the 88’s MC line and the 2001’s CS line to use as a bleeder on the third leg of the tee?
Or buy the 01 system complete and rework the firewall to accommodate the master cylinder and push rod from the peddle assembly?
I know you’re only looking for ideas but without seeing this in person I’m again unsure of what the proper direction is to go in?
Dan.

Response From loc4xchamp Top Rated Answer

Don't some clucth slaves have bleeders on them from the factory? Well Jeep didn't put one on this model. I don't usually have anyone around when I need to get the air out so pumping it out backwards is the easiest. Putting a bleeder on this one really would not work. Trying to discover how the heck air is geeting in would. Is it possible that the CS is just worn out and it's not air. The clutch MC is fairly new and no leaks. The power brake booster is directly in front of the clutch master cylinder, the 2001 MC looks to be too long coming off the firewell to mount and the rod for the pedal connection is diffrerent too.
When I purchased this Jeep I did not know about this problem. The fella I bought it from is very honest and he did not know this was going to happen either. I really like this Jeep and want to keep it. I just think there's another clutch slave out there that will work, maybe not for a 2001 Jeep. Maybe for a small truck or passenger car. Maybe not one that has a plastic line on it. I would like to add a braided ss line if possible. Then I would need to match up the proper fittings for both. right? Would that be possible? How would I find out if that motor and bellhousing is on any other type of vehicle? Thanks for your help. I really appreciate and I think WE can fix it. Please reply!! JEEP

Response From DanD

You could try going to a performance (speed) shop and see if any of their suppliers offer a universal hydraulic clutch release system that can be fitted to this thing? Other then that it’ll be trial and error until you find the right combination.
Dan.