Gears

[railroad]

I need advise or direction to a calculator to determine a ball park gear ratio for the T.
It has 32 in tall tires, a 1 to 1 high gear. The speedo seems about half right and I do not have a tach yet. The rear axle is a chebby S-10, I think, probably a high 2 or 3.00 ratio. I know there are a lot of unknowns and I will pull the cover to find the ratio, but with the tall tires I can cruise the 2 lanes in second and the engine is loafing. I do this for a little more pep. I am not into high speed, but would not want to cripple myself on the highways. I was thinking high 3's or 4.10. The tire heighth will stay. The T needs them for proper stance and appearance.

 

[benT]

I have 30" tall back tires and a 3.73 gear in an S10 blazer axle (7.5") and C-4 tranny (no overdrive) and it does well. With an even taller tire, a 3.73 should be near perfect for the street. You can find them in stock axles from S-10's with 4cylinder sticks.

 

[EX JUNK]

Perhaps this will help. It is from the Tech Pages of the NTBA.

Use this chart to calculate your final drive.​

In order for your calculations to be correct, it is imparative that your
speedometer be accurate. If you know your axle ratio and your tire
diameter, you can check your speedometer.
​

Submitted by: Michael (Mikester) Light​

 

[railroad]

In two post, I've got everything I need to make the right choice. I can find the 3.73 at the salvage yard for a good price and the chart shows me what to expect in rpm.

thanks,
railroad

 

[fluidfloyd]

Try this link for your gear ratios. Good Luck!

George

http://www.corral.net/tech/gearcalc.html

 

[choppinczech]

I know this is a really old post, but I'm setting up my rear end and found another ratio calculator that's pretty easy to use.

http://www.coastdriveline.com/htmlfolder/calculator2.html