Transmission oil over fills the transfer case???

[Sjcwaterboy]

My 67 CJ5 v6 has a T86AA Transmission and a Dana 18 TC. When I drain both and fill them, I drive it for 10 minutes, come back, open up the Transmission fill plug and the Transmission is half empty while the TC is over full and leaks out of the speedometer cable. I cleaned the vent on top of the TC and opened up the window plate to see if there was any visable obstructions but found nothing. Anyone have any suggestions?

 

[Torxhead]

Bad seals between Transmission and Transfer Case , not uncommon.

 

[BC CJ]

Bad seals between Transmission and Transfer Case , not uncommon.

Is there a seal? I read somewhere that the Dana 20 , therefore probably dana 18 too, isn't sealed from the tranny and oil can migrate between the two. Dana 300 is sealed though.

Same thing happens for me, T-15 and Dana 20 , but the oil has never come out anywhere. Just the over full Transfer Case .

 

[Torxhead]

Well, it has to be some thing leaking between the two right? so disassembly is required.

 

[NorthwestCJer]

Is the 67' pretty much stock. Have you done any mods recently to its engine and/or tranny mounts? If the transfer is hanging lower than usual. The oil will migrate to it. Is your cross member up tight to the frame, and the trany mount is in good shape?