The other day I had a shop install a used AX-15 for me and everything went great, the thing shifts like butter, got a new clutch as well. Anyway, after I park it and 10 minutes go by, a small amount of fluid leaks onto the crossmember directly below the transmission mount. I think I might have screwed up because I forgot to install a new output shaft seal on the transmission (ugh, $5 and 2 minutes of time), However the weep hole on the passenger side is bone dry, I checked the shift towner area and its dry so its definitely coming from down low, I'm assuming at the bottom of the trans/transfer case mating point. Anyone have any ideas?

 

Sounds like an output shaft seal to me. It's 2wd?

 

4wd

 

Try some AT-205. It can't hurt, and it might solve the problem. It might not. I've had results ranging from SPECTACULAR to meh. I think it may depend on seal material, and possibly the cause of the leak. A bad scratch on the sealing surface, for example, just needs to be fixed.

 

Is it red ATF from the transfer case or dark gear oil from the AX15?

Can you see if it is coming from the seam between the AX15/TC?
If so, that would tend to indicate a bad rear seal in the AX15.

 

Definitely gear oil. It has to be the output shaft seal because its the only thing in that area that could possibly leak. I switched the fluid to 10-30 synthetic motor oil and added some leak sealer just for kicks.