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Need some help. Need specs on a pinion yoke for my 71 8.5 rear...

Discussion in 'Got gears?' started by jay3000, Jan 24, 2013.

  1. jay3000

    jay3000 RIP 1-16-21

    I need a new pinion yoke for my 71 8.5 skylark rear. I don't really have an easy way to take mine off because of where it is parked and the fact that it doesn't move on it's own..

    The guy at the driveline shop is not sure which one it is on my car..

    He wants to know the spline count. ID, OD,and the depth of the splines???

    Maybe someone here can just sell me one???

    MONZAZ??
     
  2. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

  3. jay3000

    jay3000 RIP 1-16-21

  4. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

    Call Jim,
    He probably has one for you.
     
  5. jay3000

    jay3000 RIP 1-16-21

    Hmmm.. OK.. Now i'm confused..

    JD Race lists the pinion diameter as 1.625

    Driveshaft Specialists list the spline diameter as 1.312 for all the GM 8.5 10 bolt rears

    Wouldn't that be the same measurement??
     
  6. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

    I believe the pinion diameter would be the thickest point of the pinion shaft, not near the splines. I believe the 8.5 10 bolt and the 12 bolt both have the same pinion shaft diameter, 1.625.
     

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