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Mod | | | Forums66 Topics128,101 Posts1,056,181 Members48,436 | | 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: Sep 2011 Posts: 2,951 'Bolter | | 'Bolter Joined: Sep 2011 Posts: 2,951 | You need to do the calculations on THIS website. You will need to know the rear tire diameter, and rear axle gear. Plug the numbers in. The blue drive gear has 7 teeth. The red has 9. The driven gears come in different tooth counts but you MUST make sure the DRIVEN gear you need is actually manufactured and available from vendors. https://www.tciauto.com/speedometer-gear-calculator | | |
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