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Click on image for the lowdown. 
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| | | Forums66 Topics128,049 Posts1,055,695 Members48,426 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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For helping keep this great
old truck web site
on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
| | | | Joined: Mar 2006 Posts: 76 Wrench Fetcher | | Wrench Fetcher Joined: Mar 2006 Posts: 76 | The way I was tought is to count the teeth on the ring and pinion gear and divide them, that will give you your ratio. Jeremy
1961 k-10
86 c-20
02 duramax
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