Trans fluid is dripping out where my slip yoke goes into my trans at rear oil seal. What are the chances that it is just the rear oil seal and nothing else? What else could it be?

 

It is the seal. the question is could you have an internal problem that knocked the seal out or is your yoke shot.

90% chance a new seal will fix it.

 

If the seal doesn't fix it, you'll probably need another new seal - but you don't want to install it until you replace the driveshaft yoke, and the output bushing.

The tail-housing will need to come off of the transmission to do the bushing. The old bushing is probably shot, and would put undue wear on your new yoke if you left it in.
You could try not replacing the bushing and see if it holds, but if it allows the yoke to flop around too much, the seal won't last that long.
The tail-housing can probably be removed without dropping the whole transmission, so it's probably not that bad of a job - although you might need a press.

And not that it applies here, but I remember that no one could find output bushings for Borg Warner T5s, years ago, so the common trick was to use one from an AOD. The AOD version is longer and adds more support to the yoke. In those transmissions, I believe the bushing is a copper or brass sleeve which presses into the tail-housing.

 

Thanks the replies. So where do I start???? Throw a new seal in and see?

 

Yes. you didn't say what transmission you have but it doesn't really matter a new seal is where you start.
check the yoke good and if it's messed up sometimes there is a repair sleeve. sometimes you buy a new one.

 

73 C6. Sounds good. I thought it was leaking out of the split yoke and I sealed it thinking that's where it was coming from but it isn't, it's coming out of where the seal and yoke meet. When I replaced the center bearing, the split yoke seemed okay. What do I look for?

 

Just as long as it's smooth and no major rings worn in. basically anything that would prevent a good seal and or chew up the seal. be sure to coat the new seal lip with grease or oil lube it.

 

You have to drop the transfer case to get to the seal. It's not easy without a lift but it can be done. Definitely not an amateur DIY job. If you have dropped a tranny or pulled a motor before then you should be able to handle it, if not then take it to a mechanic.

 

So from the homework this is the part I ordered. I see a hole in the rubber. Do you know what position this goes? Is this the correct part? I found a post from numbers dummy who said this is the replacement.

 

Its a rwd.

 

Anyone? Thanks