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Mod | | | Forums66 Topics128,089 Posts1,056,004 Members48,430 | | 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!
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on the Internet for over 30 years! and not clogged down with Ads! Again, thanks! | | | | Joined: Dec 2010 Posts: 62 Wrench Fetcher | | Wrench Fetcher Joined: Dec 2010 Posts: 62 | I just put 3.55 ring and pinion in 1948 1/2 ton torque tube, I have a 3 speed I can buy a 4 speed for $ 50.00 .I am not pulling any weight,I would like to have a lower gear.I do not want to have to slip the clutch on hills from a dead stop, also when pulling in to tight spaces, is that granny gear a good idea? Thanks | | | | | Joined: Jan 2001 Posts: 5,337 'Bolter | | 'Bolter Joined: Jan 2001 Posts: 5,337 | I always likes the lower reverse gear, especially when backing a trailer. Also, all of the three speeds you normally use are synchronized.
See the USA in your vintage Chevrolet! My Blog | | | | | Joined: Feb 2006 Posts: 1,867 Shop Shark | | Shop Shark Joined: Feb 2006 Posts: 1,867 | Just remember to grab the crap that goes with the 4 speed. Should be a different floor panel and early sm420s are the only ones with the torque tube adapter for the enclosed drivelines. I think from 1948-1954? Anything later will have an open driveline and you'll need to find another back piece for the transmission.
Jeff | | | | | Joined: Mar 2007 Posts: 4,215 Moderator | | Moderator Joined: Mar 2007 Posts: 4,215 | I have exactly what you are talking about and I'm quite happy with it. It's up to you if you want to use first gear. | | | | | Joined: Aug 2004 Posts: 1,418 ODSS Lawman | | ODSS Lawman Joined: Aug 2004 Posts: 1,418 | I have an SM420 in my truck and I love it. I will say that granny gear is more for fun really than for much practical use. I use it for crawling into the garage, and when I am at Stovebolt HQ (like Homecoming, please see the thread in the ODSS section, PLEASE COME!!!) rolling around on the farm.
Keep in mind that first gear is not syncronized so you have to be at a stop to get in gear.
SWEET Sergeant At Arms: Old Dominion Stovebolt Society BUNS?!?!?!Where we're going, we don't need no buns.....1950 GMC 450 1951 Chevy 1/2-TonThe GreenMachineIn the Stovebolt Gallery | | |
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