E34 getrag 260 "i" different from E30 getrag 260?

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  • PУCCKAЯ_e30ka
    E30 Fanatic
    • Jan 2006
    • 1226

    #1

    E34 getrag 260 "i" different from E30 getrag 260?

    Are there any differences between the E34 525i(m20) and E30 325i 5spd trannies? Gearing/mounting/output/input shafts? Please reply asap,

    -I've searched, but didn't find anything
    -Didn't post in tranny section as I need quick reply and this is "general" question.
    Thanks guys!
    sigpic
  • Jean
    Moderator
    • Aug 2006
    • 18228

    #2
    I'll see what I can find after work for you.
    Mtech1 v8 build thread - https://www.r3vlimited.com/board/sho...d.php?t=413205



    OEM v8 manual chip or dme - https://www.r3vlimited.com/board/sho....php?p=4938827

    Comment

    • PУCCKAЯ_e30ka
      E30 Fanatic
      • Jan 2006
      • 1226

      #3
      thanks man, did you find out anything? I looked at real oem, and it does seem like the gearing is a bit higher maybe?
      sigpic

      Comment

      • PУCCKAЯ_e30ka
        E30 Fanatic
        • Jan 2006
        • 1226

        #4
        does anybody know at least a web-site with some tranny specs for E34 E30 specifically?
        sigpic

        Comment

        • r3vde30
          Advanced Member
          • Aug 2008
          • 142

          #5
          bump- I need to know this as well

          Comment

          • Knockenwelle
            Grease Monkey
            • Jul 2008
            • 395

            #6
            The numbers I have for a Getrag 260 (assume from E30) are:

            1: 3.830
            2: 2.200
            3: 1.401
            4: 1
            5: .810

            No idea on the E34 version, if it IS different. Getrag also tacked on a /# to the end of their series designator (ex: 260/5) for certain applications.
            sigpic

            Mike

            '91 325i track car. Mostly...

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            • 92 mtechnic cabrio
              Honesty is not the best policy!
              • Dec 2003
              • 4907

              #7
              I don't know the answer to this, but:

              E30 M20 260/5.15-TNW p/n is 23 00 1 221 205

              E34 M20 260/5.16-TNZ p/n is 23 00 1 221 332

              So just by comparing part numbers, I would imagine that they aren't interchangable, but I'm pretty sure it's one minute difference that either doesn't matter or you can swap something small out for its E30 counterpart.
              R.I.P 07/01/09 - 04/23/10 :(

              Comment

              • Spinning Tires
                Wrencher
                • Feb 2007
                • 283

                #8
                bell housings are definitely different
                First: 1984 318i
                Second: 1987 325
                Third: 1987 325is
                Current: 1990 325i (Soon To Be 335i)

                Comment

                • SpecM
                  R3V Elite
                  • Oct 2005
                  • 4531

                  #9
                  Originally posted by Spinning Tires
                  bell housings are definitely different
                  how so?
                  1989 cirrisblau-metallic 325i

                  Comment

                  • Spinning Tires
                    Wrencher
                    • Feb 2007
                    • 283

                    #10
                    Oh ya brain fart. I was thinking the e34 was an m30
                    First: 1984 318i
                    Second: 1987 325
                    Third: 1987 325is
                    Current: 1990 325i (Soon To Be 335i)

                    Comment

                    • Jean
                      Moderator
                      • Aug 2006
                      • 18228

                      #11
                      I looked in the "e30 restoration bible" thinking that it might have something about the differences, but no enough to answer your question..
                      Mtech1 v8 build thread - https://www.r3vlimited.com/board/sho...d.php?t=413205



                      OEM v8 manual chip or dme - https://www.r3vlimited.com/board/sho....php?p=4938827

                      Comment

                      • PУCCKAЯ_e30ka
                        E30 Fanatic
                        • Jan 2006
                        • 1226

                        #12
                        just to clarify. The car runs beautifully!!!!

                        The differences between E30 and E34 getrag 260 (talking about late "I" models)

                        -rear output flange is bigger on E34

                        -rear output shaft is bigger (machined it a bit & front section of driveshaft, fitted no problem)

                        -front pilot bearing guide sleeve is different

                        What I did to make it work:

                        -swap the guide sleeve
                        -swap the output flange
                        -machine rear output shaft

                        Not sure about gearing as it seems the same. @70mph ~3700rpm (showing 75 on E30 speedo as they do lie @ ~5% ) w/ 4.10 open differential & 195/65/14 912's
                        sigpic

                        Comment

                        • jozzze2000
                          Noobie
                          • Mar 2011
                          • 26

                          #13
                          Originally posted by PУCCKAЯ_e30ka
                          just to clarify. The car runs beautifully!!!!

                          The differences between E30 and E34 getrag 260 (talking about late "I" models)

                          -rear output flange is bigger on E34

                          -rear output shaft is bigger (machined it a bit & front section of driveshaft, fitted no problem)

                          -front pilot bearing guide sleeve is different

                          What I did to make it work:

                          -swap the guide sleeve
                          -swap the output flange
                          -machine rear output shaft

                          Not sure about gearing as it seems the same. @70mph ~3700rpm (showing 75 on E30 speedo as they do lie @ ~5% ) w/ 4.10 open differential & 195/65/14 912's
                          Interesting, didn't you have any problems with gearbox carrier?

                          We tried to fit E34 Getrag 260 to E30 325i...no luck, E34 G260 fits to m20b25 perfectly but it is rotated CCW for a few degrees so that E30 G260 carrier doesn't fit.

                          Differences (between G260) can be seen here...from left to right, E30 325ix, E34, E30 325i. Green lines on E30 run on the middle of housing almost directly to upper left bolt on bell housing. Red line on E34 misses the upper left bolt for more then an inch. So there is an explanation for CCW rotation...



                          Sorry for old threat digging :D

                          Comment

                          • nando
                            Moderator
                            • Nov 2003
                            • 34827

                            #14
                            the Getrag in the middle is only for early E34s with an M50. it was never sold in the USA.
                            Build thread

                            Bimmerlabs

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