Rear End, Gear Equation Help

[214Chevy]

Does someone know a website or something where I can input my rear tire size, etc. to figure out what size gears I need? I will be putting a 9" in my Chevelle with a T56 Magnum and want to make sure my 6th gear is very useable. So, I don't know if a 3.89 or a 4.11. My car is strictly a street car and want good driveability. I know 4.11's will use alot of gas, but I'd sacrifice the gas for a useable 6th gear.

[Romulus]

Here's a very simple one.

http://www.richmondgear.com/101032.html

Don't forget you still want to keep first useable too though and you'll wanna keep your cam/power range in mind.

[Mkelcy]

What size rear tire do you run?

[214Chevy]

What size rear tire do you run?

I have 20x11's on the rear. Approx 27-28" tall.

[Mkelcy]

PM me your email, and I can send you an Excel spreadsheet that will do everything you want, and more. :thumbsup:

[214Chevy]

PM me your email, and I can send you an Excel spreadsheet that will do everything you want, and more. :thumbsup:

PM sent, thanks!:thumbsup: