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Jul 21st, 2025 | | | | 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: 893 'Bolter | | 'Bolter Joined: Dec 2008 Posts: 893 | 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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