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Mod | | | Forums66 Topics128,024 Posts1,055,395 Members48,422 | | 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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| | | | Joined: Sep 2004 Posts: 221 Shop Shark | | Shop Shark Joined: Sep 2004 Posts: 221 | I need to discover the ratio of my 59 apache sub. My uncle has found a 292 from a chevy truck that I hope will fit.
Is there a way to figure out my gears? | | | | | Joined: Sep 2004 Posts: 221 Shop Shark | | Shop Shark Joined: Sep 2004 Posts: 221 | I have searched the axle completely and there are no numbers. | | | | | Joined: Jan 2001 Posts: 613 Member | | Member Joined: Jan 2001 Posts: 613 | if its a straight drive,go to www.randysringandpinion.com and use their calculater. | | | | | Joined: Feb 2002 Posts: 12,029 Cruising in the Passing Lane | | Cruising in the Passing Lane Joined: Feb 2002 Posts: 12,029 | if it's a stock 1/2ton, it's almost certainly a 3.90:1, and 3/4ton was 4.57 or so - if it was an overdrive it'd be a 4.10 - there was an optional positrac started in 59, but I think it was also 3.90, and rare
Bill | | | | | Joined: Sep 2004 Posts: 221 Shop Shark | | Shop Shark Joined: Sep 2004 Posts: 221 | According to the calculator I will be going from 2500 rpm @ 55mph to 1900 rpm @ 55 mph.
Or from 3288 rpm @ 70 mph to 2462 rpm @ 70 mph.
This looks good to me. | | |
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