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| | | | Joined: Mar 2018 Posts: 139 'Bolter | | 'Bolter Joined: Mar 2018 Posts: 139 | I noticed a driver’s side sag when I bought my 1951 chevy 3100 1 1/2 years ago. Finally getting around to trying to solve it. The driver’s top-of-tire-to fender measurement is 2 3/4’lower than the passenger side. Thought it might be springs ( I looked at cab mounts and the distance between cab and frame look got be the same). I took the front springs off and noticed the bushings and spring eyes hade been worn through, but not 2 3/4’ worth. Anyway, I replaced the springs with ones off a 19541/2 ton, replaced the bushings, and got all zirks working and lubed up. Still sags. So I thought maybe I put the driver’s side ‘54’s on my driver’s side ( “Bachelor lean”) so i took them off and switched them. No luck- still sags. I checked the frame and there doesn’t seem to be any tweaked areas or damage. I’m at a loss. I know I could put longer shackles on the drivers side but is there any other thing I’m missing? | | | | | Joined: Mar 2010 Posts: 10,275 Renaissance Man | | Renaissance Man Joined: Mar 2010 Posts: 10,275 | You need to measure the the cab-to-frame gaps at all four corners. Eyeballing them won't cut it. They need to be within the specs called for in The Manual. A slight variation in the cab position will cause a significant variation in the position of the front clip. Make sure that your front cab mount supports are sound and not collapsed. Make sure that the rear cab mounts have sound rubber in them.
Carl
1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission
| | | | | Joined: Jan 2016 Posts: 631 'Bolter | | 'Bolter Joined: Jan 2016 Posts: 631 | Twisted frame would be another suspect after the cab mounts. | | | | | Joined: Feb 2000 Posts: 5,208 'Bolter | | 'Bolter Joined: Feb 2000 Posts: 5,208 | Measure from the frame to ground on a level surface, then start measuring at varies points side to side till you find the problem. If you can't find the problem, level the truck on jack stands where it looks right, then start measuring again to see what has changed. If you can't find a level surface, borrow someones trailer and put the truck on the trailer. Then level the trailer front to back and side to side using jacks and blocks.
You could have poorly assembled front sheet metal
wrong front fenders
bent frame
twisted frame
bent front axle
weak rear spring
wrong length shackle
weak or missing cab mounts
rotted out cab mounts
wrong spring mount
In 70 years of service, any number of problems can cause the truck to lean. | | |
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