MrNick

Hey guys. So my problem, had always leaked a bit changed rear seal was fine. Months later alot had leaked from driveshaft yoke or rear seal i did have it up elavated in front told it came out a little hole in yoke. So my queston is can and how do i plug that hole? Should i change real seal and finaly no thats it for now thanks .

geardoc66

You did not mention which transmission that you have. Is it a THM400? That is the first one that comes to mind that has a hole in the yoke. If that is correct, do not plug this hole! If fluid is leaking from this hole, there is an oring on the output shaft that seals the shaft to the inside of the yoke that is leaking. The hole is there to let the air in and out of the yoke when the driveshaft moves in an out of the transmission. To replace the oring, you need to remove the drive shaft and the tailshaft housing from the transmission.