Originally Posted by 16valex
I don't know if I use the correct terminology, but took a look under my 97 528I the other day and it seems that there's some gear oil started to siping out from the rear of the manual trans where the drive shaft meet
How pain of a job is it and do I have to drop the tranny? Thank you all for your inputs.
I once changed the rear shaft seal on a 1985 Z-28 I owned (Borg-Warner T5 transmission). It wasn't too hard:
1) drain tranny oil
2) disconnect drive shaft at rear differential u-joint.
3) remove drive shaft, sliding it toward the rear (watch for oil pouring onto your face from the rear of the trans when you pull the driveshaft splines out)
4) remove old tranny seal ("rent" a slide hammer from Autozone to make it easy, altho I know I didn't use on ewhen I did my camaro's seal).
5) carefully align new seal and, using a suitably-sized old impact socket or similar (whatever equally pushes the new seal in all the way around its perimeter), gently hammer the new seal into place.
6) re-install drive shaft and refill tranny.
That's pretty much your basic schematic for the job. I urge you to get specifics from a manual for your particular car. I don't think you need to worry about replacing your other tranny seals if this is the only one leaking AND you can replace it using the same basic procedure as outlined above.
I agree with CN that you ought to do all the other seals if you are replacing your clutch anyway, but I wouldn't launch a clutch replacement job just because of this leak.
Good luck to you!
2006 Honda Odyssey EXL-RES
2006 Honda Accord V6 EX-L Sedan
1999 BMW 540i 6-Speed (Sold to M3UOND on 9/21/06)
1991 Honda Civic Si - Occasional Beater