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stock gear ratio

Discussion in 'The Garage' started by grindkings, Mar 8, 2005.

  1. grindkings

    grindkings 1/2 ton status

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    I'm gonna recalibrate my speedometer and i need to know my gear ratio. I have a 1991 fulsiz, of course. GM Corporate 10-bolt (8.5-in. 1.28 Axle Dia. 30 Spline). What is the gear ratio?
     
  2. AkMudr

    AkMudr 1/2 ton status

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    The lil metal tag on the diff cover will tell you, or pull the cover off and get the #'s off the ring gear.
     
  3. divorced

    divorced 3/4 ton status

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    If you know for sure that it still has the stock axles you could get the RPO code from the glove box. It usually starts with a "G"
     
  4. Can Can

    Can Can Pusher Man Staff Member Super Moderator

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    You can also refer to your RPO tag in your glovebox. You should have either a GT or GU code in the list somewhere. Let us know the code and we can tell you your ratio.
     
  5. ratzila

    ratzila 1/2 ton status

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    I had a 91 and it came with 3.42's.
     
  6. Can Can

    Can Can Pusher Man Staff Member Super Moderator

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    Hey, you, back off. You're crowding me here!!!!!:rotfl: :grin:
     
  7. divorced

    divorced 3/4 ton status

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    I'm quicker! :p:

    [​IMG]
     
  8. grindkings

    grindkings 1/2 ton status

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    GU6 maybe?
     
  9. Can Can

    Can Can Pusher Man Staff Member Super Moderator

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    It looks like you have 3.42s then, brother.
     
  10. grindkings

    grindkings 1/2 ton status

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    Thanks guys.
     

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