Originally Posted by 80cj
I had a 64 CJ-6 with the 18 T/C years ago (wish I never sold that CJ-6). I seem to remember that there was a felt ring that went in between the seal and yoke. Also, I seem to vaguely remember folks installing 2 seals to help with the seepage problem. Ever hear of that?
There is a felt ring.
I have not heard of doing the double seal thing, however, it may be possible. There is a lot of room in the retainer for the stock seal.
There should also be a rubber O ring behind the output shaft yoke nut, which helps seal the splines.
The issues I have seen the most are:
The bearing preload going, allowing the yoke to move vertically in the seal, allowing it to leak. No one ever seems to catch this one till well into the second or third seal replacement.
Debris in the seal causing damage.
The yoke seal surface grooved so badly a good seal simply isn't possible.
these only cover the input/output leaks. There are still the inspection cover gasket, intermediate shaft, PTO cover, as well as the shift shaft seals and the ever faithful trans/t case gasket (which I believe leaked from the factory).