Never got into transmissions myself. They are so cheap and plentiful used, that it's not really worth it to rebuild them IMO. I've picked a few up at the junk yard for between $75-150, usually with 30 day warranties. Usually if it's a bunk tranny, it's going to die pretty quickly, within the 30 days. And swapping them out only takes a few hours.
I would guess that you could find a rebuild kit at the local parts store, if anywhere. No other idea on that myself. Performance kits? Probably not, though I imagine there are valves and things like that you can change around. However, the automatics in these cars are the definition of "slushbox."
If you want to get performance, do a 5-speed swap on the car. You'll probably have to swap to the 5-speed axles, if they're different (check any parts store website to see if the parts have the same numbers). Then all you need is the shifter, linkage, clutch cable, and pedal assembly. It's a pretty straight forward swap and fully bolt-in.
Good luck with whichever you chose. Keep us updated, let us know how it goes and what you decide to do.

Bookmarks