Transfer Case Bearings?

[rideak]

I have a 2002 PSD - auto tranny, selector 4wd.

There is grinding noise that is getting worse that appears to be coming from my transfer case. It only happens when I switch to 4wd with my hubs locked. We went through the entire front end already - hubs, all u-joints, wheel bearings, needle bearings, differential, and driveshaft - everything was okay.

When I push on the accelerator it starts up (very loud and it can be felt in the floor) - if I let off and coast, it almost entirely goes away. It is not there at all in 2wd with or without my hubs locked. Are there bearings that normally go bad in the transfer case? Any help is appreciated.

[ttyR2]

Your sure the pinion bearings are good in the front diff?

[rideak]

Originally Posted by ttyR2

Your sure the pinion bearings are good in the front diff?

Yep - we checked those and they are good.

[Supercharger07]

Having the exact same problem here, did you ever find out what it was??? Stumped!

[NoRalPh]

If the FE is all good, the next & easiest thing to check is the driveshaft. You have to take it out to really check it and not only the U-Joints but the Cardin Joint, located between the two U-Joints, has a ball & spring in it that can make quite a bit of noise. You'll "feel" it rather than see it's bad...