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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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| | | | Joined: Feb 2005 Posts: 531 Shop Shark | | Shop Shark Joined: Feb 2005 Posts: 531 | Ok, basic question... What's the gear ratio on a stock 56 Stepside? I've been looking thru all of my materials and can't seem to find the info.... | | | | | Joined: Oct 2002 Posts: 77 Wrench Fetcher | | Wrench Fetcher Joined: Oct 2002 Posts: 77 | Most of the 3100's had 3:90 from the factory with a manual tranny | | | | | Joined: Feb 2005 Posts: 531 Shop Shark | | Shop Shark Joined: Feb 2005 Posts: 531 | But Wait! There's more! Just found info in the back of my Resto Guide... BUT it states 3.90:1 for a 3100-3200 and 4.11:1 for a RPO 3100-3200...
What's an RPO???? | | | | | Joined: Dec 2004 Posts: 452 Member | | Member Joined: Dec 2004 Posts: 452 | RPO=regular production option.
The 4.11 gears came with RPO 315, which was the overdrive transmission.
Curt
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1953 Chevy 6400, 1957 Chevy 2dr Sedan
--"Mediocrity is easy, the good things take time"
| | | | | Joined: Feb 2005 Posts: 531 Shop Shark | | Shop Shark Joined: Feb 2005 Posts: 531 | | | |
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