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Mod | | | Forums66 Topics128,095 Posts1,056,475 Members48,444 | | 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: Feb 2011 Posts: 1,363 'Bolter | | 'Bolter Joined: Feb 2011 Posts: 1,363 | Curious what everyone is using for rear end ratios? Since the old under powered trucks had to make it up with low gears. Problem is that makes em pretty slow on the freeways. Has anyone upgraded the axles or can you still get ring and pinions for the larger trucks?
Kicking self for selling off my Taskforce trucks.
Still looking for an LCF or conventional big bolt in decent shape.
As of 10-26-2022, A 55.2 Taskforce long bed now the work begins
| | | | | Joined: Apr 2005 Posts: 1,107 'Bolter | | 'Bolter Joined: Apr 2005 Posts: 1,107 | the ashton is a 8.81 low range and a 6.33 in hi i dont know what the dump is but its close to the ashton. the 40 is a 4.56 Problem is that makes em pretty slow on the freeways i can exceed what the lowest speed is by law. i run the majors every chance i get. if they want to run up my [censored] then they'll know what gear i got as they're pulling my gears out of thier teeth  | | | | | Joined: Mar 2004 Posts: 6,214 'Bolter | | 'Bolter Joined: Mar 2004 Posts: 6,214 | My Fire Engine has an Eaton 2-speed with 6.14/8.36 gears and will run low 60's all day long. I have 11.00 x 22.5 tires and it's powered by the 322 V8 with a 4k rpm governor. My tow truck has the GM 2-speed with 6.40/8.72 gears and will run 65 mph. It has 10.00 x 22.5 tires, it's powered by a 350 sbc without a governor. Mike B  | | | | | Joined: Nov 2009 Posts: 73 'Bolter | | 'Bolter Joined: Nov 2009 Posts: 73 | What kind of RPM are you running Mike. On my firetruck and I assume its geared same as yours at 2500 rpm I am about 50 miles per hour. | | | | | Joined: Mar 2004 Posts: 6,214 'Bolter | | 'Bolter Joined: Mar 2004 Posts: 6,214 | The gears in my truck are not stock to 1957...I swapped them in when I got the truck and I have no idea what they were in originally. The junk yard had lots of truck third members hanging on a rack and I found this one that fit my rear housing making it an easy swap. I'm turning about 3500 rpm at 65 mph. If I push it to 70 I start bouncing off the governor which is set at 4000 rpm. Mike B | | |
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