While replacing the input seal on my transmission for the 2nd time in the last 2 months, I found my selector shaft seal was also leaking. I called up my local BMW dealership and found out they had both parts I wanted in stock.
Selector Shaft Seal is part #12
Part #23121282394 ~$8-$9
Gearshift Rod Joint is part #12 as well
Part #25111222688 ~$10-$12
Being that I had the exhaust and driveshaft already out of the car, it was MUCH easier. I'm not able to discuss if this could be done with this stuff still in the car, but I found that it would be VERY VERY difficult with the exhaust/driveshaft still installed.
I even had to lower the rear tranny support to get some angle to be able to pry out the selector seal.
First was to remove the lock ring on the rod joint. At the bottom of the rod joint, there is a small opening to get a small flathead screwdriver into to get it started.
Once I was able to get some separation in the lock ring, I got a bigger screwdriver in there and was able to py the lock ring off the rod joint.
Once the lock ring is removed you need to remove the lock pin in the center of the rod joint. I used a 90 degree pick, and just pushed the lock pin from the top of the rod joint, and then pulled it out with my fingers
Once the lock pin is removed you will be able to pull the old rod joint of the selector shaft..
After the rod joint is removed, take another small flathead screwdriver and CAREFULLY pry the selector seal out WITHOUT scoring the seal bore. Being that the seal is very thin, be VERY careful with this. This was the hardest part, as its tough to get a grip on the seal and remove it. Be patient and just keep trying
I found that a 15mm deep socket was the perfect size to go around the selector shaft and fit on the seal to carefully tap back into the seal bore. Be careful not to tear the seal, and slowly tap the seal back in with the socket. I used some transmission fluid (RP Synchromax) to lube up the seal and the seal bore to make it easier to install
Once the seal is flush again with the seal bore, reinstall the new rod joint. With the new foam inside the rod joint, you will need to push the selector rod back all the way into the transmission, as the foam with fight back against you when you reinstall the locking pin. Once the locking pin is reinstalled back in the rod joint, take a small screwdriver again, and just move the lock ring back into the groove to lock everything back together
Reinstall the gear shift selector rod, and you are good to go
Put everything back together, and enjoy
Selector Shaft Seal is part #12
Part #23121282394 ~$8-$9
Gearshift Rod Joint is part #12 as well
Part #25111222688 ~$10-$12
Being that I had the exhaust and driveshaft already out of the car, it was MUCH easier. I'm not able to discuss if this could be done with this stuff still in the car, but I found that it would be VERY VERY difficult with the exhaust/driveshaft still installed.
I even had to lower the rear tranny support to get some angle to be able to pry out the selector seal.
First was to remove the lock ring on the rod joint. At the bottom of the rod joint, there is a small opening to get a small flathead screwdriver into to get it started.
Once I was able to get some separation in the lock ring, I got a bigger screwdriver in there and was able to py the lock ring off the rod joint.
Once the lock ring is removed you need to remove the lock pin in the center of the rod joint. I used a 90 degree pick, and just pushed the lock pin from the top of the rod joint, and then pulled it out with my fingers
Once the lock pin is removed you will be able to pull the old rod joint of the selector shaft..
After the rod joint is removed, take another small flathead screwdriver and CAREFULLY pry the selector seal out WITHOUT scoring the seal bore. Being that the seal is very thin, be VERY careful with this. This was the hardest part, as its tough to get a grip on the seal and remove it. Be patient and just keep trying
I found that a 15mm deep socket was the perfect size to go around the selector shaft and fit on the seal to carefully tap back into the seal bore. Be careful not to tear the seal, and slowly tap the seal back in with the socket. I used some transmission fluid (RP Synchromax) to lube up the seal and the seal bore to make it easier to install
Once the seal is flush again with the seal bore, reinstall the new rod joint. With the new foam inside the rod joint, you will need to push the selector rod back all the way into the transmission, as the foam with fight back against you when you reinstall the locking pin. Once the locking pin is reinstalled back in the rod joint, take a small screwdriver again, and just move the lock ring back into the groove to lock everything back together
Reinstall the gear shift selector rod, and you are good to go
Put everything back together, and enjoy
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