Thread: gearing
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Old 04-16-2017, 01:01 PM   #2
Clyde65
1965 Chevy C10, 2005 4.8L/4l60
 
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Join Date: Aug 2004
Location: DFW Texas
Posts: 8,539
Re: gearing

Easy to find out. Should be a tag on rear end. Another option is to jack the truck up and turn one wheel and count the revolutions of the pinion. If it does about 3, then you have a 3.07 more than likely. If it goes almost 4, then you have a 3.73.

I would suspect if you have a 3speed trans you probably have the 3.07 gear ratio.

If you want to run a 5 speed, it would serve you best with a 3.73:1 rear gear.
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