I I'm plagued by a leak from the top of my '94 MUA 5spd(s). The first one blew oil pretty bad when driven at HWY speeds for at least 3 years (how long I've had it, I discovered the tranny had no oil in it after I bought it), then that unit went bad and I replaced it with a clean '92 MUA unit. 2 days after running it, I noticed oil dripping. Pulled the cover from over the shifter, and determined that it is indeed coming from the top of the tranny, but not from the shifters. Looks like maybe the linkage extension housing.

Thoughts? Is there a common leaking culprit that I am not aware of?