This transmission also has a leaking shifter shaft. The area where the shifter plugs in was always full of GL4 and causing a dribble on the floor. So I had a chance to try both my latest discoveries about removing that wedge pin to take the shifter rod out to change that little seal, AND how to remove and replace that little buried seal.
Success on both cases. The air hammer gun popped the wedge pin out in 30 milliseconds again, and this time without any heat.
I bought a set of really long seal picks, and that’s all it took to get that little seal out. You just need to put the tip of the 90 deg pick under the seal and YANK.
And then to put it back in, I had no choice but to spend time on the lathe making a seal pusher-in-ner thingy. What other option would there be? Guess you could whack it with a 3/4” punch tip, but what fun is that.
The specs are 13.9 OD on the seal ID part, 13mm long, then a section of 19.8 mm again 13 long. The nose guides into the hole, and the OD is just a tad smaller then the seal to push it home. The place it sits is about 1.5 times deeper than the width of the seal, so make sure it goes all the way to the bottom.
I have no clue why the old seal leaked other than it was pretty hard and fit pretty loosely on the shaft. It was not damaged.
Oh yeah, remember to put the dang thing in the right way. Oil is in FRONT of it, so when you insert it, with the open side to the back, against the insert tool.