How to tell if rear transmission seal is bad

[cncmastr]

Mods please move, I am a fool for creating this in the wrong section.

Hi guys,

I was inspecting my car for parts that need to be replaced, and I noticed some fluid around the rear transmission seal. I just want to make sure that before I buy parts, that it is the actual transmission seal that is leaking and not something else.

PS - I know I need a GUIBO that is in the shopping cart already.

Thanks in advance,

JP

[JGood]

There's two seals back there, the shift selector seal, and the trans rear main seal. I'd do both while you have the driveshaft off the trans. Would be a good time to refresh shifter bushings as well. That stuff isn't very easy to get to with the driveshaft in place.

Here is a write-up for an e36 trans with good pics, the e30 trans only varies slightly, the procedure is pretty much identical.

http://m3forum.net/m3forum/showthread.php?t=269673

[cncmastr]

Thanks for the tip!