Puegot BA 10/5 Front input seal
Since I've had the jeep there has been an oil leak at the rear of the engine, bell housing area. I assumed it was the notorious rear main seal and put it on my list of things to tend to. About a month ago I put a new internal slave, and when I had the transmission out I noticed there was oil inside the bell housing. When I got it back together the oil leaking out onto my exhaust was definitely the new gear oil I put back into the transmission, no mistaking it for motor oil. The front shaft seal was worn out, allowing transmission oil to leak down the bell housing then out and underneath, right where you would see oil from a rear main seal.
I searched around and finally found a FSM online for the BA 10/5 and pulled it out again, removed the front bearing retainer (5 studs and two bolts, just fits on the front of the transmission case) and put in the $5 seal (lots of work to put in such a cheap part) and went to put it back together. Unfortunately there was some galvanic corrosion around one of the bolts holding the bell housing in place and it stripped the threads out. I'm beginning to hate steel bolts into an aluminum case. Now I'm waiting on the M10 heli-coil to arrive so I can repair it and hopefully fix the leak that has plagued me for so long. The whole job wasn't too bad, but I'm beginning to learn that no matter what you go to do on this 20+ year old machine there will be some twists in the job.
I'm also wondering how many of you have changed out rear main seals when your transmission shaft seal was the culprit??