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    Author Topic: diff gears  (Read 583 times)

    Offline cudachall74

    • Jr. Member
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    • Posts: 118
    diff gears
    « on: June 23, 2009 - 01:11:56 AM »
    hi all not sure of my diff gears running 360 904 15 wheels with 60 series tyres 60mph revs about 3800rpm anyone running the same or know conversion :cheers:
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    74 barracuda
    74 challenger


    Offline MEK-Dangerfield

    • C-C.com Expert
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    • I don't get NO respect! Member since 1/25/2002
    Re: diff gears
    « Reply #1 on: June 23, 2009 - 08:44:01 AM »
    We would need to know how tall the tires are, or what series(255,275, ect). Just a guess, I'd say you have 3:91's, or 4:10's in the rear.

      Mike
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    Mike

    1970 Challenger - SOLD
    2016 SXT+.  1 of 524 SXT+'s in Plumb-crazy for 2016.

    Offline Changin Gears

    • Sr. Member
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    • Posts: 1011
    Re: diff gears
    « Reply #2 on: June 23, 2009 - 12:11:42 PM »
    The equation for gear ratio with an auto trans is:


    axle ratio = (RPM * tire diameter) / (MPH * 355)


    (substitute 340 for 355 with manual trans)
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    The goal never changes - Stop the 60' timer with your back tires

    Offline cudachall74

    • Jr. Member
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    • Posts: 118
    Re: diff gears
    « Reply #3 on: June 24, 2009 - 12:05:45 AM »
    thanks for the input guys looks like 3.91s.thats why she likes smoken the bags :burnout: :woohoo:
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    74 barracuda
    74 challenger
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