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Find your axle ratio...example w/pics.

Discussion in 'The Garage' started by jtexfisher, Aug 31, 2006.

  1. jtexfisher

    jtexfisher Registered Member

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    Location:
    Way East Texas
    Just for fun...in case someone else likes to see it before they do it.

    This method assumes no locker/posi etc. as my truck has open diffs and auto.

    -Lift 1 wheel off the ground, block the truck, no parking brake or 'park' with auto.

    - Mark the driveshaft/diff. housing for reference. Photo 'mark before'.

    - Mark the tire and make a reference mark on the ground. Chalk mark and chalk on dirt in my case. Pardon the color..camera went flaky on that shot. Photo 'tire mark'.

    - Rotate the wheel TWO FULL revolutions while counting the number of revolutions the drive shaft makes. In my case the driveshaft made 3 full revolutions plus the amount in photo 'mark after'. Looks like 3.08s on this truck.:(



    jt

    mark before (Small).JPG

    Tire mark (Small).JPG

    mark after (Small).JPG
     
  2. muddybuddy

    muddybuddy 3/4 ton status

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    sweet pink rims ;)
     
  3. the beast

    the beast 1/2 ton status

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    Or you could just pop the cover and look for the numbers stamped on the ring gear.
     
  4. 4xcrazy

    4xcrazy 3/4 ton status

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    yeah, and change the gear oil while you're at it, probably hasn't been changed in some time if you've never had it off and figured out the ratio by then.
     

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