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help olds-pontiac rear question ??????

Discussion in 'The Hokey Ass Message Board' started by mike budniewski, Sep 18, 2006.

  1. mike budniewski
    Joined: Jul 30, 2005
    Posts: 327

    mike budniewski
    Member

    i have a 3 rib 57-58 center section 29 spline posi unit the ring gear #s read 42-13 they are gm gears anyhow what ratio is this i know its been a topic lately thanks mike
     
  2. RacerRick
    Joined: May 16, 2005
    Posts: 2,756

    RacerRick
    Member

    Take the ring gear and divide by the pinion gear - that will give you the ratio. In your case, 42/13 is a 3.23 gear.
     
  3. mike budniewski
    Joined: Jul 30, 2005
    Posts: 327

    mike budniewski
    Member

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