Shop Discount Pinion Bearings

I have a 89 GMC Vandura. Just recently I started to hear a grinding sound from the rear of my van whenever I let off the gas.I don't hear it when I step on the gas, but as soon as I take my foot off the gas I hear it. Any idea what it could be?

Probably a bad pinion bearing.

I have a 2000 silverado 2wd with a 4.8l my rear end has a whine that has been getting worse i'm not sure how to check to see whats wrong or how to fix it yet it has a limited slip and gears installed. thanks in advance for your input

ou have a couple of choices. pou can take it apart and look for any abnormal wear, ring and pinion backlash, various bearing damage. or you can take it to a qualified tech to have them diagnose it for you. If it whines on accelleration, it can be a pinion bearing or the ring and pinion clearance is too close. If it whines on decelleration, either the pinion bearing or ring and pinion clearance is too wide. If it whines or growls on turns maybe the axle bearings. The carrier bearings can cause noise in either of the above conditions or all the conditions. Good luck.

changed pinion seal in the rear end, yoke still leaks gear oil. any suggestions ?

What shape was the seal surface of your yoke? I like to polish on them with some scotchbrite and lightly lube before install as sometimes a light burr can be present. Also, these seals are rather fragile and can be damaged if not installed just right. Add to that you can get dud seals. Before install, you need to get all the old sealant (stuff that looks like paint) out of there. The seal must be put in as gently and straight as possible. Look at the back of the seal to ensure the spring is securely in place, not loose or missing. I find them more often than I wish I did. Lastly, make sure your pinion bearing preload is right and the pinion bearings themselves are good. If the bearings are loose it will damage the seal and leak again. On the upside, its a cheap seal and easy to put in.

1999
Isuzu
Trooper
4wd
150,000

My truck suddenly started making a loud growling noise with vibrations. I took it to the shop and they said it was bad rear u joints. They replaced them but it was not any different than when I took it in. It starts the noise and vibrations at about 30 mph and increases with speed ( not that I am driving any faster). The shop said the drive shaft looks good. So what else could it be should I have someone check into?

Sounds like they misdiagnosed it. It was probably a bad wheel bearing or maybe even a pinion bearing.

I have a 1993 Trans Am 350ci with a whistle / whining sound from the rear end. I thought it was a bad rear end, but I was told it might be a bearing. Which is it? It only makes the sound when driving, not as bad when letting off of the gas, or when coasting. Any suggestions? Thanks , Thomas.

There are 2 types of noises to come from a differential and sometimes hearing it is the only way to notice the different

A howling or whining noise is usually caused by gear wear or mismatch problems

When you have a bearing problem, it shows as a growling noise. The timing of the noise is pointing to a problem in the pinion area, either the pinion bearing or the ring and pinion match.

I wouldn't give up on it yet. Given the symptoms you describe, it's very possible that you have a bad outer pinion bearing. Although this would still require dissassembling the differential, it can be changed rather easily and the only setup required would be to re-use all the same shims it came with.