need to get the gears for my trans while it's apart.
what color should I get ????

th 400 3.73's and 245r15's on 8.5 rims

A.S.A.P.

THANKS!

http://www.tciauto.com/tech_info/speedo_gears.htm

Check out TCI's website... they have a chart. Not sure it'll help or not. There is another chart floating around somewhere but I can't find it.
Good luck!

thanks HWY.
well that says I need a 43 tooth gear they only sell 38 teeth gears.the gears I have come out for a 3.23 gear set,I think thats what the truck had but not sure.

I guess I need to find a different drive (main shaft)gear.

GM sells all the gears.

I'm using the brown gear, I think that's a 39 tooth. I've got 3.73's and 235/60-15's. It's pretty accurate. But it all depends on your drive gear.

What you need to do is check what your car should be doing at 60MPH (including converter slippage), and then find out your RPM when the speedo reads 60.