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crashz · 03-16-2015, 04:30 PM

I don't think so.

There was a great post with a GM frame chart here, but I can't find it. Anyway it related GVWR and series with bending moment. There was a lot of factors, but mostly relating to section modulus, and for those series (as dimensions are basically the same for long bed rails) the thickness of the steel was the difference. There was some crossover, but very little. IE- its possible that a heavy 1/2 frame rail would be the same as a light duty 3/4 rail, but it would need to be referenced by serial number.

03-16-2015, 04:30 PM	#2
crashz Registered User Join Date: Jul 2012 Location: MA Posts: 207	Re: Frame rails I don't think so. There was a great post with a GM frame chart here, but I can't find it. Anyway it related GVWR and series with bending moment. There was a lot of factors, but mostly relating to section modulus, and for those series (as dimensions are basically the same for long bed rails) the thickness of the steel was the difference. There was some crossover, but very little. IE- its possible that a heavy 1/2 frame rail would be the same as a light duty 3/4 rail, but it would need to be referenced by serial number. __________________ 2012 Chevy 2500HD, 6.0L, 6spd auto, 4x4, ECSB 1987 GMC V3500 Dump, 6.2L diesel, TH400 1983 GMC K2500 - awaiting its restoration and Cummins swap.