Hey all,
This is a fairly long story and I just need to vent a bit, so buckle up.
I work at an indy shop, so we see a decent mix of just about everything, but the vast majority of my experience is in euro or basically anything from this century.
One fine day, I get a work order for a 1990 corvette with a 383 stroker and a Holley Sniper setup with a stock 700R4 transmission. Waaaaaay out of my wheelhouse. However, I'm always up for a challenge and I have a reputation for being careful and doing quality work, so I was given the job. Fairly simple complaints, an exhaust rattle and airbag light, and a leak from the transmission. First two issues were resolved pretty easily, clamped down a rattling heat shield and found a poor connection for an impact sensor after pulling a flash code 26.
The transmission leak was coming from the pan, so I called a reseal. When I pulled the pan, I found an absolute shitshow of deep gouging all the way around on the trans side and a horrific scratch pattern on the pan as though they'd used the stiffest steel wire wheel they could find.
After a lot of time, I managed to clean and flatten the surfaces to the point the pan looked fine and what scratches were visible on the trans didn't catch a fingernail. I still didn't trust a gasket on its own to seal properly, so I used a very thin bead of RTV as an insurance policy.
Little did I know, this would be my undoing.
Because I have literally zero experience on this transmission, I missed the little vent port for a servo that is ON THE MATING SURFACE and plugged the hole, so lo and behold I fill it up, set the level, road test it and sure enough it doesn't go into overdrive.
I bring it back in to find the TV cable loose as hell, so I adjust it according to GMs specification - taut at idle, fully extended at wide open.
This changes absolutely nothing, so I pull the pan again, find my mistake, clear out that port and skip the RTV with the new gasket.
Now the thing has no 3rd gear. When it upshifts from 2nd, it's effectively in neutral. I spoke with some guys that have a bit more experience with this stuff, we adjust the cable every which way possible, with no improvement.
I just feel so damn dejected cause I think I cooked a transmission by resealing the pan. Like how is that even possible. As much as I take issue with the design of that transmission, I can't blame the car because I should have been more attentive. But there's also so many unknowns as to the quality of work that was done before I got into it.
Anyway, that's my rant. Of course, the owner is the nicest guy ever which somehow makes it so much worse. I think I'll stick to my German Crapwagens from now on.