Premature wheel bearing failures.

69FBCuda said

I have a Jeep TJ which has the 4H/4L through the xfer case so I'm either in or out. I do know what you mean when in 4x4 it gets grabby. I guess what I'm getting at is make sure the hub is freewheeling when the truck is in gear and that the diff is not dragging, if it were it would get hot real fast.be running very cool.l

When you get it back together run it for a few miles and check it with an infrared temp gun and compare to the drivers side also shoot the front diff, it should should be running a lot cooler than the rear diff. If your cooking the grease in the hub should be able to back track it from there.

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Thank you this is great info.
By grabby I mean that when i put it in 4wd on a hard surface (pavement gravel hard dirtroad. Doesn't do it if its slippery like grass or snow) the front end will grab and kinda jerk like its trying to spin the tires makes it hard to steer in 4x4. Kinda like a spool in a drag car when you turn really sharp it chirps the back tires. My front tires do that when in 4x4.
The diff fluid is a good catch im gonna check that out. Because my wife's car is awd and the front end was acting up and was really grabby like my truck does and I took it to the shop and the diff fluid was low. And after that it cleared right up. So that's an idea thanks again