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Mod | | | Forums66 Topics128,135 Posts1,056,423 Members48,441 | | 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
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| | | | Joined: Oct 2018 Posts: 59 Chief Bottle Washer | | Chief Bottle Washer Joined: Oct 2018 Posts: 59 | Howdy,
Found a Craigslist ad selling a pinion and ring gear;
"Brand new. Never installed. Pinion # 10394-62-3 or 3740874GM 10 teeth. Bearing included...Gear: 39 teeth. 3697702-10-30-4-62GM."
Any mathematical folk care to tell me if this is a 3.55 ratio?
Thanks-Jim | | | | | Joined: Jan 2013 Posts: 1,518 'Bolter | | 'Bolter Joined: Jan 2013 Posts: 1,518 | 39 divided by 10 is 3.9, so no
Last edited by sstock; 04/16/2019 3:17 PM.
1953 Chevrolet 3100261 cu inch, sm420, 3.55 rear, torque tube still,omaha orange, still 6 volt, RPO green glass, side carrier spare, all done In the DITY GalleryVideo of the 261 running1964 GMC 1000305 Big Block V6, sm420, the next cab off restoration
| | | | | Joined: Dec 2008 Posts: 899 'Bolter | | 'Bolter Joined: Dec 2008 Posts: 899 | That would be a 3.90 ratio.
Brian
1955.2 3100 Truck
The older I get the more dangerous I am!!!!! | | | | | Joined: Oct 2018 Posts: 59 Chief Bottle Washer | | Chief Bottle Washer Joined: Oct 2018 Posts: 59 | Thanks for the quick response !
Jim | | |
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