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Diff question.. 3.25 or 3.64?

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    Diff question.. 3.25 or 3.64?

    Hi all

    I've swapped my 91 325i from auto (4.1 diff) to a 5 speed, and I found the first gear too short.
    I have these 2 diff sitting, both open, 3.25 and 3.64 and I wonder which one would be better to improve the mpg in city driving?

    Thanks!

    e30 mtech2 cabrio bbs rs

    E30 M3 RESCUED

    Alpina C2 REP

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    #2
    The 3.25 will probably bore you to tears. The 3.64 give give you a little better mileage than a 3.73 and performance should be about the same somas long as you have it that would be my choice.
    Seat Shocks....I have passed the baton to John Christy from Ninestitch. Email John or Garrett at ninestitch1@gmail.com

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      #3
      Originally posted by jeffnhiscars View Post
      The 3.25 will probably bore you to tears. The 3.64 give give you a little better mileage than a 3.73 and performance should be about the same somas long as you have it that would be my choice.
      Yep, this!
      2006 GMC Sierra 2500HD 4WD LBZ/Allison
      2002 BMW M3 Alpinweiß/Black
      1999 323i GTS2 Alpinweiß
      1995 M3 Dakargelb/Black
      - S50B32/S6S420G/3.91
      1990 325is Brilliantrot/Tan
      1989 M3 Alpinweiß/Black

      Hers: 1996 Porsche 911 Turbo Black/Black
      Hers: 1988 325iX Coupe Diamantschwartz/Black 5spd

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        #4
        You will love winding out 3rd with the 3.64!!!!!!!!

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          #5
          Thanks buddies.. I'll do the swap to 3.64 then, and I'll tell you my experience..

          e30 mtech2 cabrio bbs rs

          E30 M3 RESCUED

          Alpina C2 REP

          instragram e30company

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