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Mod | | | Forums66 Topics128,077 Posts1,055,928 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!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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For helping keep this great
old truck web site
on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
| | | | Joined: Jul 2006 Posts: 707 Shop Shark | | Shop Shark Joined: Jul 2006 Posts: 707 | What can be done to bring the rpm's down besides tire changes? I hear it's a 5.17. Are other (lower numeric) gearsets available for the stock carrier? Tack-on overdrives? What? What?
-Mark (yep. Another one.)
1951 3800 Be the change you want to see. -hotshoe
| | | | | Joined: Oct 2003 Posts: 5,152 Cruising in the Passing Lane | | Cruising in the Passing Lane Joined: Oct 2003 Posts: 5,152 | That is basically the same rear GM used in 3/4- and 1-ton trucks up through 1972. Some of the automatic trucks had 3.something gearsets in them. You can swap just the carrier fairly easily. That's the approach I'd recommend.
I just made this some comment somewhere else recently, have you asked the question on this or another board? Or did I answer it for someone else too?
1955 1st GMC Suburban | 1954 GMC 250 trailer puller project | 1954 GMC 250 Hydra-Matic | 1954 Chevy 3100 . 1947 Chevy COE | and more...
It's true. I really don't do anything but browse the Internet looking for trouble... | | | | | Joined: Jul 2006 Posts: 707 Shop Shark | | Shop Shark Joined: Jul 2006 Posts: 707 | OldSub;
Orchidskip has a '57 3600 and asked the same question in this forum. Wasn't sure if your answer applied to my '51 and, since it's all about me, I thought I'd ask. Now I know it all. Thanks!
-Mark
1951 3800 Be the change you want to see. -hotshoe
| | | | | Joined: Oct 2003 Posts: 5,152 Cruising in the Passing Lane | | Cruising in the Passing Lane Joined: Oct 2003 Posts: 5,152 | I knew I recognized the question...
I'm going to tell everyone you learned it all from me. No one will believe it, but I'm going to tell them anyway.
LOL!
1955 1st GMC Suburban | 1954 GMC 250 trailer puller project | 1954 GMC 250 Hydra-Matic | 1954 Chevy 3100 . 1947 Chevy COE | and more...
It's true. I really don't do anything but browse the Internet looking for trouble... | | |
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