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Thread: Can someone calculate my diff ratio for me ?

  1. 03-18-2018, 04:47 PM #1
    ANGST
    ANGST is offline Member
    Join Date
    Feb 2016
    Location
    Herndon, Virginia
    Posts
    57
    My Cars
    1992 325is

    Can someone calculate my diff ratio for me ?

    92 325is , stock tranny . 2600 rpm at 55mph in 5th .

    Tire size = 205/60/15


    Thanks, nothing online is working with this info , and I am on my phone
    -------------------------------------------------------------
    '92 325is
    '17 Mustang GT for a Daily
    -------------------------------------------------------------
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  2. 03-18-2018, 05:35 PM #2
    gdavid
    gdavid is offline Member
    Join Date
    May 2017
    Location
    Owings, Md
    Posts
    1,105
    My Cars
    1998 328i
    My math came out to 3.47 which leads me to think you have the 3.45 from a 3.18i (manual)
    Last edited by gdavid; 03-18-2018 at 05:37 PM.
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  3. 03-18-2018, 06:30 PM #3
    ANGST
    ANGST is offline Member
    Join Date
    Feb 2016
    Location
    Herndon, Virginia
    Posts
    57
    My Cars
    1992 325is
    Ok , it came from the factory with an LSD , I found the window sticker. The previous owner also put a Quaife diff in later
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