the 3.73 front diff does exist

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  • downforce22
    No R3VLimiter
    • Aug 2009
    • 3192
    #1

    the 3.73 front diff does exist

    Most sites show that the early auto iX's had 3.73 final drives. Here is one front from an early auto car.

    http://www.ebay.de/itm/BMW-E30-325ix...item20e031afd1







    With that said... Good luck finding a viscous rear.

    Any chance you could take a us spec V3.91 or something and rebuild it using parts from a US spec 3.73S from a RWD car to make a viscous rear end to match?

    Last edited by downforce22; 08-15-2014, 06:03 AM.
    318iS Track Rat :nice: www.drive4corners.com
    '86 325iX 3.1 Stroker Turbo '86 S38B36 325

    No one makes this car anymore. The government won't allow them, normal people won't buy them. So it's up to us: the freaks, the weirdos, the informed. To buy them, to appreciate them, and most importantly, to drive them.
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    • The Dark Side of Will
      R3VLimited
      • Jun 2010
      • 2796
      #2
      Originally posted by downforce22
      Any chance you could take a us spec V3.91 or something and rebuild it using parts from a US spec 3.73S from a RWD car to make a viscous rear end to match?
      Already had that done with U.S. market 3.64 gears. No reason 3.73's wouldn't work.

      Nice find!

        Comment

        • nando
          Moderator
          • Nov 2003
          • 34839
          #3
          the carrier on the ix is different but the ring/pinion should fit.

          known about the 3.73 but never seen one before. I don't think they made too many early automatics.
          Build thread

          Bimmerlabs

            Comment

            • Northern
              I like cupcakes & sh!tboxes
              • Nov 2010
              • 5216
              #4
              Originally posted by The Dark Side of Will
              Already had that done with U.S. market 3.64 gears. No reason 3.73's wouldn't work.

              Nice find!
              I picked up a 3.64 R&P from Haoming/Wangan just for this purpose. Just too busy to ever work on any of the cars.
              Originally posted by priapism
              My girl don't know shit, but she bakes a mean cupcake.
              Originally posted by shameson
              Usually it's best not to know how much money you have into your e30

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                • The Dark Side of Will
                  R3VLimited
                  • Jun 2010
                  • 2796
                  #5
                  Originally posted by Northern
                  I picked up a 3.64 R&P from Haoming/Wangan just for this purpose. Just too busy to ever work on any of the cars.
                  I had Markert set up a viscous rear with 3.64's and E36 rear cover.
                  I've been thinking that snagging a 3.64 front would help me phase the project, so I could do the full rear suspension with Z3M subframe before the engine swap.

                  I also have an E23 210mm diff that bolts to the E30 subframe, as well as the E32/E34 rear cover and E36 M3 CSL mount bracket to make it bolt-in for the 188 with e36 rear cover. I need to snag an e32 3.64 unit so I can get this franken 210 built up as well.

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