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| | | | Joined: Aug 2011 Posts: 229 'Bolter | | 'Bolter Joined: Aug 2011 Posts: 229 | Did a search, but… My '51 GMC , ONE TON, never has had rear shock absorbers. There are original lower shock mounts welded to the rear axle housing but NO an upper shock mounts on the frame rails.
I would like to put the upper mounts in but everything available seems to be for half ton trucks .
Is anyone in the same boat? Thanks | | | | | Joined: May 2015 Posts: 11,159 Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums | | Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums Joined: May 2015 Posts: 11,159 | Looking at the 1951 Chevy vehicle info kit, the 3800 rear shocks were RPO not standard equipment. I'd assume that GMC's were the same. The FAM shows upper brackets rivet to the inboard of the frame on 3800's with PN 3705695 (LH) and 3795696 (RH) with a lower mount welded to the axle tube. Those same upper mounts were used on 4000, 5000, and 6000 series Chevys. So maybe you could find a pair of upper mounts on a bigger truck.
Kevin 1951 Chevy 3100 work truckFollow this saga in Project JournalPhotos 1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car) Busting rust since the mid-60's If you're smart enough to take it apart, you darn well better be smart enough to put it back together. | | | | | Joined: Aug 2011 Posts: 229 'Bolter | | 'Bolter Joined: Aug 2011 Posts: 229 | klhansen , Thanks for the info. I will attempt to locate a couple of those. Great info for all of us!  | | | | | Joined: Jan 2022 Posts: 2,492 'Bolter | | 'Bolter Joined: Jan 2022 Posts: 2,492 | GMC Master Parts Book lists part number for your '51 250 series truck's rear shocks as part number 5513639 with an asterisk that says "Determine if option required". Same book shows Frame Shock Absorber Bracket part number 3693689 with the same asterisk.
Looks like an option to me.
'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: Oct 2021 Posts: 6,951 'Bolter | | 'Bolter Joined: Oct 2021 Posts: 6,951 | Are you expecting an improvement in the ride by adding them?
1950 Chevrolet 3100 (Ol' Roy)
1939 Packard Standard Eight Coupe (The Phantom) | 1956 Cadillac Coupe de Ville (The Bismarck) | 1964 Ford Galaxie 500 coupe |1966 Ford Mustang (Little Red) | 1969 Pontiac GTO (The Dishpit) I 1979 Ford F-100 | 1976 Ford F-150 (Big Red) | 1995 Ford F-150 (Newt)
| | | | | Joined: Aug 2011 Posts: 229 'Bolter | | 'Bolter Joined: Aug 2011 Posts: 229 | Only some minor improvement in the rebound portion. I don't think anything can be done on the compression when you have more leaf springs than can be counted!!! | | | | | Joined: Oct 2021 Posts: 6,951 'Bolter | | 'Bolter Joined: Oct 2021 Posts: 6,951 | That's what I was thinking.
1950 Chevrolet 3100 (Ol' Roy)
1939 Packard Standard Eight Coupe (The Phantom) | 1956 Cadillac Coupe de Ville (The Bismarck) | 1964 Ford Galaxie 500 coupe |1966 Ford Mustang (Little Red) | 1969 Pontiac GTO (The Dishpit) I 1979 Ford F-100 | 1976 Ford F-150 (Big Red) | 1995 Ford F-150 (Newt)
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