Thread: Transmission Fluid On The U-Joint

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Have a little transmission fluid dripping from the u-joint, behind the TH400 tranny. The yoke out of the tranny is dry, so I know that seal is not leaking. Can this fluid be somehow coming through the yoke?

Thanks, Denny. I'll take it apart and take a closer look. The manual shows an o-ring on the trans output shaft, just forward of the spline. Wondering if that is to seal the fluid from the yoke. Guess I should see that when I remove the drive shaft.

When there over filled they can leak trans fluid out the vent hole of the yoke .

Originally Posted by DennyW

The area in concern will only leak when the vehicle is shut off, the vehicle on an incline with the front of the vehicle up.:

Hey! Thanks for that information, Denny!

Every time I park my S-10 on the up-slope into my garage I get an oil spot on the concrete and I can't figure out where the heck it comes from, then, when I park on a level place and go under to look for the leak I can't find one because it ain't leaking.

My wife is always always kind enough to point out oil spots on our expensive concrete drive (as though I didn't know they were there), so I appreciate your help in the prevention of hostility at my house.

Jim

Thanks to all of you! Excellent help, as always.