Which Years Fit for Diff Swap?? I have a 71 1/2 Ton 4X4

Discussion in '1967-1972' started by Dirt Racer, Mar 30, 2007.

  1. Dirt Racer

    Dirt Racer Member

    Mar 30, 2007
    Hillsboro, OR
    Hi I have a 71 Custom Deluxe 4X4 1/2 Ton, it has 307 gears, (sucks), I want better pulling power, I heard you could swap later model diff housings (up to 87 as I remember), with little trouble, I remember being told one end was a direct bolt up and the other you had to change 2 brackets. This also gave better brakes & steering too. I'm after it for the better gears 4.10's at a minimum!

    Please help!

  2. chevyholic

    chevyholic Member

    Aug 23, 2007
    St Joseph, MO.
    Yes the 71 to 87 front will be a direct bolt in, on the rear you will have to move the spring pads and also move the shock mounts, still a pretty simple swap. The only problem I see is you are not going to find a set of factory axles with 4.10 ratio in a 6 bolt 1/2 ton version, the best you will be able to do is 3.73s. If you want to step up to a set of 3/4 ton axles they will swap in with the same amount of work and 4.10s are easy to find.
  3. pacratt696

    pacratt696 Member

    Nov 22, 2007
    hay im in calif an ive got a set of 86 axles an transfercase an trans an motor if want it come 2 calif

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