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RPO codes for 4.10 gears

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by 6.2Blazer, Nov 8, 2000.

  1. 6.2Blazer

    6.2Blazer 1/2 ton status

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    I know this topic has been covered before, but I don't remember anyone listing the RPO "glove box" code for 4.10 gears. I'm going to look at some 3/4 ton axles and would like the 4.10's.

    Also, here is what was listed before for the other ratios:
    GU2 - 2.73
    GU4 - 3.08
    GU6 - 3.42
    GT4 - 3.73
    G80 - Gov-lok

    Do these look correct for everyone?

    thanks
     
  2. ken

    ken 1/2 ton status

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    The code for 4.10s is GT5. The code for 4.56s is HC4. The codes you listed are all correct.

    ken
     

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