My car currently has a TH350 in it. It was converted from a 200R4 to a TH350 about 2 years ago. I found out, I really needed overdrive and should have done that in the first place, but what do I need to swap to a 700R4? So far, I know I need a new shifter, go from a detent cable to a TV cable, and of course, the transmission and converter. Do I need to get a new driveshaft? This driveshaft is the same one I had with the 200r4. The crossmember is the same right? Also, what do I need to make the converter lock up?

 

Your car would have had a 200c, not a 200-4r. You'll probably need a new driveshaft, and I think you'll have to drill a couple of new holes for the crossmember, but I'm not sure.

 

Aaaaah! I can't believe I had that bad a brain fart! I know it had the 200c. I think I had the 200-4r on the brain after talking to a few buick guys. Don't know why I called it a 200r4 either.

 

You should seriously consider a 200-4r over a 700-r4. You were on the right path.