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ok I went stupid again, looking for formula for gear ratio w/o looking

Discussion in 'The Garage' started by LKJR, Oct 12, 2002.

  1. LKJR

    LKJR 1/2 ton status

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    ok spin tire count revolutions of tire & driveshaft but what is the formula after I do that, I can't remember....

    thanks in advance
     
  2. Pure Insanity

    Pure Insanity 1/2 ton status

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    Open the cover and just get the #s off the ring gear. That is the easiest and most fool proof way to do it. /forums/images/graemlins/deal.gif

    Chances are if you dont know the ratio you have, youve never serviced the diff anyhow, and it could use an oil change. It shouldnt take more than 30 min to do. /forums/images/graemlins/thumb.gif
     
  3. m j

    m j 1/2 ton status

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    get a piece of string a couple feet long
    tape one end to the driveshaft so that when it turns the string will wrap around the shaft
    mark the tire and roll forward exactly one tire revolution.
    now count how many wraps the string has made on the driveshaft
     
  4. FWP

    FWP CRS

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    Interesting way of doing it, good idea.
     

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