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| | | | Joined: Jul 2023 Posts: 58 'Bolter | | 'Bolter Joined: Jul 2023 Posts: 58 | What are the physical differences between the 1951 chevrolet 3100 and 3600 trucks. The body and frame, but also most specifically the cab. I have found one for parts locally, but not sure what all will interchange. thanks in advance 
"Commonly quoted life advice I dont even try to live by." -Famous Person
| | | | | Joined: Sep 2009 Posts: 5,918 Gearhead, Stovebolt Tech and Parts Tracker, Mod for Swap Meet and GTT | | Gearhead, Stovebolt Tech and Parts Tracker, Mod for Swap Meet and GTT Joined: Sep 2009 Posts: 5,918 | 327amc, Click on THIS LINK to read up on the many details about both your 3100 and the 3600 straight from the GM Heritage Archives. This document can provide you a whole bunch of useful information to learn about your truck. There are also a great number of other references in our own Stovebolt Tech Tips that you can read about various topics on your truck, as well as other sources outside of Stovebolt which folks will share as you begin asking more detailed questions about your truck and the things you need help with. One of the best suggestions I can offer is to ask more detailed specific questions (instead of an overall general topic) with posts in the Shop Area Forum where the topic best fits. This helps reduce confusion and redundant topics/questions and allows folks to provide you better specific answers and help. Take some time and read through this resource and peruse the various Tech Tips and forums to get a little more familiar with the site. Then come back and ask away. Once again, Welcome to Stovebolt! Dan
~ Dan 1951 Chevy 3 window 3100Follow this story in the DITY Gallery"My Grandpa Carl's Truck and How it Became Mine"1966 Chevelle (Wife's Hot Rod) | 2013 Chevy Silverado (Current daily driver) US Army MSG Retired (1977-1998) | Com Fac Maint Lead Tech Retired (1998-2021)
| | | | | Joined: Jul 2023 Posts: 58 'Bolter | | 'Bolter Joined: Jul 2023 Posts: 58 | Thanks for the links. Very informative. Looks like the only difference is 3600 longer frame, wheel base, and bed.
"Commonly quoted life advice I dont even try to live by." -Famous Person
| | | | | Joined: Nov 2021 Posts: 1,383 'Bolter | | 'Bolter Joined: Nov 2021 Posts: 1,383 | The frames are significantly different behind the cab. The 3600 frame is basically straight back whereas the 3100 frame flares wider as it goes back. It makes a big difference if you are looking to mount a fuel tank between the frame rails behind the rear axle. | | | | | Joined: Jan 2022 Posts: 2,466 'Bolter | | 'Bolter Joined: Jan 2022 Posts: 2,466 | This is a GMC answer (I don't have the correct Chevy books) to the "most specifically the cab" part of 327AMC's question. I think the raw cab is the same between the Chevys and GMC of your era.
1950 GMC Master Parts Book lists different part numbers for 100 (1/2 ton), 150 (3/4 ton) and 250 (1 ton) cabs. Unfortunately I don't know what the difference is, but I doubt that GM would have had separate part numbers if they could have used just one.
'57 GMC 102, Original 347 V8, HydraMatic, 3.08 rear gear, added A/C, disk front brakes, HEI, AFB carb, '98 Honda Black Currant paint. T-boned and totaled 10/12
'52 GMC 152 Stake Bed, Original 228, SM420, added A/C, HEI, disk front brakes, '67 Chev 3.55 rear gear. Gets used as a real truck.
| | | | | Joined: Jul 2021 Posts: 214 'Bolter | | 'Bolter Joined: Jul 2021 Posts: 214 | I am working on my project starting with a 3100 frame grafted with C4 Vette front & rear suspension.
My cab is a 6400(15,000 gvwr) with a title. The 5 window cab I bought with the project had a severe cave in on top. Found another 5 window that's the 6400. The hood and inner/outer fenders are the only difference. Doors only vary with or without wing windows, but fit in the space. Windows all around are identical.
GMC's have different grill, but most is the same is what research has told me.
Chip
'Rusto-Mod'
'51 Chevy 3600 5 window | C4 Corvette front/rear suspension & drivetrain | everything else looks old and stock
'92 GMC Sonoma GT #15 of 806
'91 GMC Sonoma GT Extended cab 1 of 1
Trucks, Trucks.....and more Trucks | | | | | Joined: Feb 2004 Posts: 29,814 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,814 | Dash panel shape and gauge clusters also vary between Chevy and GMC.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
| | | | | Joined: Mar 2010 Posts: 10,281 Renaissance Man | | Renaissance Man Joined: Mar 2010 Posts: 10,281 | The only difference I can think of between 3100 and 3600/4400 cabs would be the transmission floor cover. The 4400 would have a hole in that cover for the 4 speed floor shifter and the hand brake.
Last edited by 52Carl; 07/29/2023 12:09 AM.
1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission
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