K1500 700R4 rear trans seal

[Mr_Rich]

Originally Posted by ChevyTech

There is a seal in the front of the transfer case and it is a double lipped seal that seals fluid from moving in either direction. These seals can be very hard and brittle which seems unusual sense there is fluid on both sides of the seal. Usually they have several cracks in the seal material.

With a truck that old the T-case output seal could be hard too. Do to the truck having been hit the T-case output shaft may be bent.

I rebuilt the drivetrain in the 2011-2012 time frame. I freshened up the seals and bearings at the time. I wouldn't expect the seals to be brittle. It didn't seem to me like trans fluid should get past the output shaft (of the trans) in the support area of the transfer case. I don't have a good area to work on it now. It's a dirt lot and I may have to create some kind of cement or brick pad for my work on it.