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measuring for axle shims - pinion needs to be a little up or a little down?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by TX Mudder, Nov 26, 2002.

  1. TX Mudder

    TX Mudder 1/2 ton status

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    I did a shackle flip on my longbed and I am measuring the ujoint angles so I can get some shims.
    In my NON-CV rear driveshaft, I want the axle pinion to be 1 degree up at rest or one degree down at rest?
    It will make the difference between two sizes of shims. Thanks.
    -- Mike
     
  2. BorregoK5

    BorregoK5 1/2 ton status

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    You want 1 degreee down at the pinion from having equal angles at both ends of the shaft. This compensates for axle wrap which will pull the pinion nose up under load.
     
  3. TX Mudder

    TX Mudder 1/2 ton status

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    Thanks, I measured and have ordered offset (1.5") shims with the (hopefully) correct taper. We'll see in about 2 weeks!
    -- Mike
     
  4. BorregoK5

    BorregoK5 1/2 ton status

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    Definately post back with your results - I'm collecting shim data on my site to help people identify the correct shim just by make model and drivetrain equipment.
     

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