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Tried some gear calculators, can somebody help me?

Discussion in 'The Garage' started by 88K5Jimmy, Oct 2, 2002.

  1. 88K5Jimmy

    88K5Jimmy 1/2 ton status

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    Ok I have totally confused myself on trying to calculate what my engine rpms would be at 65-70 mph for this combo:

    modified k5
    35" tires
    700-R4 tranny
    NP 208 t-case
    3:73 gears

    This is what I currently have:
    stock k5:
    31" tires
    700-R4 tranny
    NP 208 t-case
    3:08 gears

    At about 65-70, the rpms are at about 1800-2000

    Can someone calculate my modified k5 combo for me and tell me what rpms I would be running at 65-70, or is there a specific site for me to do this at? Every site I have tried can't even get the rpms at 65-70 right for my stock k5 combo.

    Thanks
    Ross
     
  2. Muddytazz

    Muddytazz 1 ton status

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  3. Shaggy

    Shaggy 3/4 ton status

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  4. rebelk5frk

    rebelk5frk 1/2 ton status

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    Going from 31" and 3.08 gears to 35" with 3.73 gears is only going to be a couple of hundred RPM difference. So everything should "feel" about the same.

    Another place to try would be 4LO.com's gear calculator.
     

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