73-87chevytrucks.com

73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Rear Drivelines, Drive Axles and Gearing => Topic started by: dirtracer on May 22, 2006, 05:59:00 pm

Title: gear ratio question
Post by: dirtracer on May 22, 2006, 05:59:00 pm

I have a 43 teeth ring gear and a 14 teeth pinion gear which makes it a 3.07 gear ratio,but i didnt think chevrolet had a 3.07,thought they only had a 3.08 gear???????Also will a 3.07 or 3.08,whatever it is swap out even with a 2.56 gear in the front.Both are 12 bolt.Any help would be appreciated.thanks

81 k10

Show results

Title: Gear ratio
Post by: Blazin on May 22, 2006, 07:34:00 pm

The front and rear are always off by one number from the factory. You have to have matching front and rear ratios. Example 4:11s, front 4:10s rear. or 3:72s front, 3:73s rear.

Title: gear artio question
Post by: dirtracer on May 22, 2006, 07:49:00 pm

What i was asking is my gear ratio with 43 ring gear and 14 pinion gear comes out to be 3.07,why is it called a 3.08 if its a 3.07?

Title: Re: gear artio question
Post by: roundedline on May 22, 2006, 11:15:00 pm

For generalization.  .01 isn't that much to worry about.

You cannot use 2.73 with 3.08.

Chris Lucas
www.73-87chevytrucks.com
www.captkaoscustoms.com
Project Su
Jimmy 2WD Project