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81-87 gm 1/2 to 3/4- 1 ton Frame differences ?

Discussion in 'Chevy Trucks' started by massbowtie, Aug 9, 2013.

  1. massbowtie

    massbowtie Member
    Messages: 97

    What are the differences ? Im looking at trading my road glide for a 1987 chevy 1/2 ton p/u that has either 3/4 or 1 ton axles and suspension. What I would like to do is put a
    5th wheel hitch in it so in the rare event of my main truck crapping out I could use it as a back up. I know legally it can only haul what a half ton can and boxing the frame or adding crossmemembers wont change it either. We usually haul with in 2 hours from homebase, maybe 3 on a rare event.The trailer runs about8-8500lbs.I do know the frame width on the 1/2 is narrower than the 3/4 ton Im just not sure what years that is.
    The more I think about it the less feasible it sounds for the 5th wheel idea. Sliding a 1 ton frame under it and swapping everything out is alot of work but its a really nice truck.
    Any input is apreciated.
  2. CAT 245ME

    CAT 245ME PlowSite.com Addict
    Messages: 1,066

    81-87 GM 1/2 ton & 3/4 ton frames are the same.

    With the right gears that truck will pull the weight, I know my 85 K20 with 4.10's will with a mild built 350 engine turning 35" tires.
  3. SMiller

    SMiller Member
    from IN
    Messages: 46

    That is not correct, the 3/4ton has the same size frame but it is thicker making it stronger, the 1ton frame is 1in. taller as well as thinker yet then the 3/4ton.

    1/2ton. frame is not narrower then 3/4ton or even 1ton.