Did you try and change it from the stock? I know when I changed to my 3:55's, the shop called and supposedly got the right one for the new gears, but it was off too (21 tooth). So I called a guy that sold Ford upgrades, and he said I needed the black one (23 tooth I believe). It has been right now. I have 16" wheels.
It's been a while since then, but that's what I think I remember.
Hope this is what your asking?
Brad
------------------
1991 Mustang GT Conv.
Removed silencer, K&N air filter, Cobra manifold, 65mm TB,
Adjustable fuel pressure regulator, 180 thermo., Mac headers,
High flow H-pipe, Force II W/2 chamber Flowmaster,
Hurst Shifter, 3.55 gears, subframes
|