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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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For helping keep this great
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on the Internet for over 30 years! and not clogged down
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| | | | Joined: Mar 2004 Posts: 6,212 'Bolter | | 'Bolter Joined: Mar 2004 Posts: 6,212 | Keoni, Keeping the stock trans and rear will still net you the same top speed as the original 6 cylinder when running the same RPM. You will have way more HP than you will use. Finding a taller (lower number) 2-speed rear ring and pinion gear set will be almost imposible. You didn't say what year and size your truck is, but if it has a GM rear there are only a few ratios made...most trucks back then had the same HP and Torque ratings so taller gears weren't needed. If you have an Eaton rear then you might find better gears to fit your housing...that's what I did on my Fire Truck. I went from 53mph (7.17:1 single speed) to 63mph (6.14/8.36:1 2-speed). More HP would be nice when going up long hills. Mike B  | | |
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