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rear axle rpo code

Discussion in 'Chevy C/K Truck Forum' started by david mac, Mar 1, 2010.

  1. david mac

    david mac New Member

    My 85 C10 rear axle code is GQ1. which when looked up is standard ratio. Does any one know what std. ratio is?
  2. canislupis69

    canislupis69 Epic Member 5+ Years ROTM Winner 5000 Posts

    GQ1 means you have a standard rear end with no traction adder. Look for another rpo code in the glove box for the ratio. It usually starts with GU or GT:
    GU2 2:73 ratio

    GU4 3: 08 ratio

    GU5 3:23 ratio

    GU6 3:42 ratio

    GT4 3:73 ratio

    GT5 4:10 ratio

    GQ1 Open Differential Rear Axle

    G80 Positraction/Locking Rear Axle

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