200 4R Install Questions.

Treblig said

I think any adapter will work but I went with the TCI because it was the thinnest (1/4"). The thicker the adapter the further back it pushes the transmission and the more you have to cut out of the upper cross member. I use my car for driving around for pleasure and have 3:90 gears. It could easily handle 4:10s but I'd probably lose gas mileage on the highway.
I have a thread that shows everything I did for my install:

Will GM 200r4 work with factory floor shift location?

treblig

Click to expand...

Great, thanks. found another thread you posted in. was hoping that you would answer to this. Defiantly want a 1/4" Adapter. Here are some of the gear calculator scenario's I did.

R&P Ratio Tire Height Speed Trans Ratio
3.91 28.8 65 .67
1987 RPM
R&P Ratio Tire Height Speed Trans Ratio
4.10 28.8 65 .67
2083 RPM
R&P Ratio Tire Height Speed Trans Ratio
3.91 28.8 140 .67
4279 RPM
R&P Ratio Tire Height Speed Trans Ratio
4.10 28.8 140 .67
4487 RPM
R&P Ratio Tire Height Speed Trans Ratio
4.88 28.8 65 .67
2479 RPM
R&P Ratio Tire Height Speed Trans Ratio
4.88 28.8 140 .67
5340 RPM
R&P Ratio Tire Height Speed Trans Ratio
5.38 28.8 140 .67
5888 RPM

Going to look into the gears more. Don't think i want to do 200 mph in this car without some kind of spoilers ! Figuring in going through the traps between 120-140. Going to put a cage in a year after it's road worthy.