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Can someone tell me what gears i have

Discussion in 'The Garage' started by 84CUCV, Mar 16, 2006.

  1. 84CUCV

    84CUCV 3/4 ton status Premium Member

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    Its a 87 1ton 4x4. has a 350 and a sm465. Also, its a dually if that matters. I was told its 4.56 or 4.10s. thanks for the help as always
     
  2. ballu_one

    ballu_one Registered Member

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    ballu a big one and site back for the ride my friend

    well it sounds like u have 373's iner cause u just never no these days
     
  3. R77K10

    R77K10 Banned

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    pull a cover

    look at the RPO sticker

    get stamping code off axle tube or tag


    no one here is going ot know what you have any better than you do


    good luck
     
  4. tarussell

    tarussell 1/2 ton status

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    Your three factory options should be 3.73 , 4.10 or 4.56's .
    4.10's being the most common but all were availble.

    Tom
     
  5. 84CUCV

    84CUCV 3/4 ton status Premium Member

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    What is a rpo? thx mike
     
  6. tarussell

    tarussell 1/2 ton status

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    RPO = Regular Production Order They are codes used by GM to identify parts/options.

    Example : A "M22" is a RPO for the old close ratio high performance Muncie "Rock Crusher" 4-speed used from 1965 to 1974 in GM cars .

    Tom
     
  7. Bushido

    Bushido Registered Member

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    Rpo

    Look for the sticker in the glovebox(if still there).
     
  8. 84CUCV

    84CUCV 3/4 ton status Premium Member

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    got it thx mike
     
  9. OffRoad

    OffRoad 1/2 ton status

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    mark driveshaft
    jack up 1 rear tire.
    spin tire i revolution
    count how many time the mark went around
    4 and a bit = 4.10s
    4 and a half = 4.56s
    3 and three quarters = 3.73s

    :laugh:
     
  10. Janitorjim8

    Janitorjim8 1/2 ton status

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    It says in your sig its a CUCV, correct me if I'm wrong, aren't those 1 ton CUCV's with 4.56s?
     
  11. 84CUCV

    84CUCV 3/4 ton status Premium Member

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    Yes, cucv 1 tons have 4.56, but this is atruck i am getting. thx offroad for that.
     

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