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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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| | | | Joined: Jan 2021 Posts: 4 Moderated | | Moderated Joined: Jan 2021 Posts: 4 | Can someone tell me what the width from wheel mounting surface to wheel mounting surface is on a 1940 1/2 ton Chevy pickup? Mine was on a S10 frame when I bought it and I’m swapping it back to an original frame with MII front suspension and four link rear suspension. I’m looking for the correct width so I can find either a 9” or 8.8 Ford rear diff.
JWUpton
| | | | | Joined: Feb 2004 Posts: 29,838 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,838 | I've never seen an "original" 1940 frame with independent suspension and a 4-link rear. Got any factory part numbers for that setup? Wouldn't if be more appropriate to match the rear track width to the M-II?
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: Jan 2021 Posts: 4 Moderated | | Moderated Joined: Jan 2021 Posts: 4 | I guess I didn’t make myself clear, I’m adding the MII(already tacked in place), I’m going to add four link rear suspension (parts ordered from Fat Man) I’m looking for the width of the stock ‘40 Chevy pickup rear diff from wheel mounting surface to wheel mounting surface so I can find a donor rear end. When I bought the truck, the owner had attempted to swap it onto a S10 frame and I’m putting it back on an original frame with the above described mods. I’m working on the assumption that I need 60” from wheel mounting surface to wheel mounting surface but would appreciate someone verifying that for me.
JWUpton
| | | | | Joined: Jan 2021 Posts: 4 Moderated | | Moderated Joined: Jan 2021 Posts: 4 | I guess I didn’t make myself clear, I’m adding the MII(already tacked in place), I’m going to add four link rear suspension (parts ordered from Fat Man) I’m looking for the width of the stock ‘40 Chevy pickup rear diff from wheel mounting surface to wheel mounting surface so I can find a donor rear end. When I bought the truck, the owner had attempted to swap it onto a S10 frame and I’m putting it back on an original frame with the above described mods. I’m working on the assumption that I need 60” from wheel mounting surface to wheel mounting surface but would appreciate someone verifying that for me.
JWUpton
| | | | | Joined: Apr 2017 Posts: 230 'Bolter | | 'Bolter Joined: Apr 2017 Posts: 230 | Jim,
I have a 1940 Pu frame I’m working on. PM me if you want measurements...
Mike
1940 Chevy 1/2 Ton presently... Almost done
1940 Chevy Business Coupe... In pieces
| | | | | Joined: Jan 2021 Posts: 4 Moderated | | Moderated Joined: Jan 2021 Posts: 4 | I guess I didn’t make myself clear, I’m adding the MII(already tacked in place), I’m going to add four link rear suspension (parts ordered from Fat Man) I’m looking for the width of the stock ‘40 Chevy pickup rear diff from wheel mounting surface to wheel mounting surface so I can find a donor rear end. When I bought the truck, the owner had attempted to swap it onto a S10 frame and I’m putting it back on an original frame with the above described mods. I’m working on the assumption that I need 60” from wheel mounting surface to wheel mounting surface but would appreciate someone verifying that for me.
JWUpton
| | | | | Joined: Jul 2006 Posts: 36 'Bolter | | 'Bolter Joined: Jul 2006 Posts: 36 | i dont know off hand what the width is but i can tell you that a mid 70s camaro rear axle is the right width for what you are doing. i do have one at home i can measure and let you know. | | |
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