dieselho

Hi All. Headed to the desert yesterday. Noticed severe vibration at 75 mph. After returning home, I crawled underneath to observe the obvious. What i found was the right rear of the t-case was covered in ATF that was coming down from the top. It is not constantly dripping, but their was a sign of dripping on the bottom of the case itself.
I was thinking that the vibration was due to bearing failure in the drivetrain somewhere. I checked the t-case fluid level and found that it was slightly full. Tranny fluids are also good. Now I can notice the vibration coming on under moderate acceleration. Im wondering if a crack in the t-case is allowing enough movement in the bearings to cause a vibration and is the cause of the leak under high speeds. I havent towed anything since last August, and the majority of the miles since then have been put on in town. Anybody else's opinion is appreciated.

nitrousn

Drop the shafts and check the ujoints.

dieselho

I hope thats all that it is. I plan on doing that when my workload permits. I still am curious though where the ATF is coming from . Thanks for the reply.

nitrousn

You are going to have to clean it off and watch closely for where its comming from.

Jim Dynomite

Take a look at the carrier bearing for vibration problems. The one where the two piece driveline comes together.

As for the leak, if the dipstick shows full, maybe someone overfilled the T-Case. There is a breather somewhere on top.

..........Jim

dieselho

The breather on top makes sense. Later tomorrow night, i will see if i can locate it. This truck does not have a carrier bearing though. It is 4x4. I still haven't had time to pull the d-lines out. I will try tomorrow night as well. Thanks all.