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Mod | | | Forums66 Topics128,095 Posts1,056,075 Members48,433 | | Most Online14,466
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!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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| | | | Joined: May 2012 Posts: 14 New Guy | | New Guy Joined: May 2012 Posts: 14 | I see alot of beds on older and not so old trucks that are crooked.Does anyone know what causes this?Reason I ask is I just bought my first truck last week (66 gmc) and its nice and straight and Id like to make sure it stays that way.Also if this does happen,what is a good remedy to fix it? | | | | | Joined: Sep 2006 Posts: 3,596 'Bolter | | 'Bolter Joined: Sep 2006 Posts: 3,596 | The older trucks use 2-1/4" tall wood blocks that have bed bolts running through them to support the bed. When these rot away or wear out they sag. Also cab mounts wear out making the cab lean further compounding the look. | | | | | Joined: Feb 2006 Posts: 1,867 Shop Shark | | Shop Shark Joined: Feb 2006 Posts: 1,867 | Some trucks have been so abused that the frames can be tweaked just enough so the bed isn't square when you measure both diagonals even though everything looks fine. This is mainly with the newer trucks that have a bed mounted directly to the frame, such as '60 and newer unless I'm mistaken.
Otherwise, there can be any number of tiny things that can cause it right down to a worn suspension on one side.
Jeff | | | | | Joined: Jun 2010 Posts: 1,001 Shop Shark | | Shop Shark Joined: Jun 2010 Posts: 1,001 | The older trucks use 2-1/4" tall wood blocks that have bed bolts running through them to support the bed. When these rot away or wear out they sag. Also cab mounts wear out making the cab lean further compounding the look. Haha. All the wood blocks on my '52 are gone. The bed is being support by the floor boards directly in contact with the frame axle "hump". The saggin bed caused the bed to rub a hole in the top of the filler panel between running boards and bed. Not to mention all the strain and cracking to rear fender sheet metal at running board connection. | | |
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