Uneven Bed
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Freshman User
Joined: Mar 2010
Posts: 47
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From: Viola,Idaho
Uneven Bed
I could use some advice on getting the box on my 1956 F-100 level.The right side is 5/8- 3/4" lower on the pass side. Can it be shimmed or is it an issue with the running boards also.Any help from those that know would be great.
Hotshot
Joined: Oct 2009
Posts: 16,188
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From: Burbank, WA
You can shim the bed, but it might be better to investigate a little further and determine why the bed is uneven, rather than throwing a band-aid on it without checking to see if something is broken. My 2c.
Hotshot
Joined: Oct 2004
Posts: 15,882
Likes: 88
From: Durham NC
This is not a normal or common problem, there is something else wrong. Are you measuring the bed to the floor or to some other part of the truck? First block/shim the frame level front to back and side to side (check that the rear of the frame is level side to side when the front is level) then measure everything from the floor and/or check level. I expect you will find you have a twist in the frame, bed, worn/collapsed rear cab mounts, or sagged suspension.
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Freshman User
Joined: Mar 2010
Posts: 47
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From: Viola,Idaho
Well I measured and put a level to everything. The font of the box is dead level. Rear shock perches measure out perfect. I think the issue is with the right rear leaf springs,blocking off the axle is the same height and there is no shackle adjustment so I'm thinking that I may have some leaf sag.The floor to frame is good but the floor to rear leaf shackles are off.
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Hotshot
Joined: Oct 2004
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From: Durham NC
If the lean is in the suspension, it's not unusual for the driver's side suspension to sag more than the passenger side due to there being more weight being consistently carried on that side. Also you may have a cracked spring leaf and/or worn spring eye bushings and shackle pins on that side.
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Thread Starter
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Freshman User
Joined: Mar 2010
Posts: 47
Likes: 1
From: Viola,Idaho
If the lean is in the suspension, it's not unusual for the driver's side suspension to sag more than the passenger side due to there being more weight being consistently carried on that side. Also you may have a cracked spring leaf and/or worn spring eye bushings and shackle pins on that side.
Fleet Mechanic
Joined: Mar 2005
Posts: 1,511
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From: peyton, colorado
My F1 bed is crooked too. The cross members were all bent, cracked or broken. I welded and straightened as best as I could, but it's still not level. In my case, when I remove the bed for paint, I'm going to replace all the cross members with square tube.
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