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Hard Shifting into 2nd

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    #16
    Bump from the dead. I started noticing this after my 5 speed swap.
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      #17
      Originally posted by Threehz View Post
      As it says. Shifting into second isn't actually hard, but it's not smooth and totally makes spirited take-offs less fun, also annoying for general driving purposes.



      I'm wondering, do I simply need a new bushing kit or is the old stick slowly taking a shit? Any ways to tell?

      Synchronizers are wear items.

      Bmw still has new parts avail.

      Picture of the Guts of a zf 5 speed; you can see the heat marks on the synchronizer wear surfaces as it must equalize speeds.




      This particular box would not go into 1st. The male spline part is production welded to the gear, it fractured in a couple places and the weld broke clean off. Guide tube, Syncro all ruined.

      OBD1 M54/M52TU swap as a M50b25

      Z4 non powered steering rack fits e30



      Euro e46 2005/6 320d 6mt gearbox into E30 with M20 hardy and beck 1985 327s engine

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        #18
        New hose to slave cylinder helped me

        Before my 30 year old rubber clutch hose was replaced the shifting was slow.

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          #19
          Originally posted by Wanganstyle View Post
          Synchronizers are wear items.

          Bmw still has new parts avail.

          Picture of the Guts of a zf 5 speed; you can see the heat marks on the synchronizer wear surfaces as it must equalize speeds.




          This particular box would not go into 1st. The male spline part is production welded to the gear, it fractured in a couple places and the weld broke clean off. Guide tube, Syncro all ruined.

          This is indeed true, syncros are a wear item.

          Issue is, once you open up the gearbox, you may as well replace all the bearings. Those are not cheap, i calculated €1,337 just for the bearings. Then, replace all syncros is another €890 as well. So, we are just over €2K for just the parts, assuming nothing else is grinded, broken or needs replacing. Also required are a lot of big pulling tools, and some would need to be grinded down to fit between the gears.

          My local dealer offers €3.8K for a replacement transmission, taking in your old on (basically a rebuild) and you get a 2 year BMW warranty.

          So...what would you do?

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            #20
            Originally posted by S.J.1981 View Post
            This is indeed true, syncros are a wear item.

            Issue is, once you open up the gearbox, you may as well replace all the bearings. Those are not cheap, i calculated €1,337 just for the bearings. Then, replace all syncros is another €890 as well. So, we are just over €2K for just the parts, assuming nothing else is grinded, broken or needs replacing. Also required are a lot of big pulling tools, and some would need to be grinded down to fit between the gears.

            My local dealer offers €3.8K for a replacement transmission, taking in your old on (basically a rebuild) and you get a 2 year BMW warranty.

            So...what would you do?
            I build everything from scratch locally for shops. This is the motorsports world way of doing it if you have the ability/tools/budget/shopspace etc and demand for actual racing product.

            Actual racing product = car is trailer only, racing in a competitive series wheel 2 wheel = Not r3vtard spec


            These gearboxes were damaged in racing, replacement new parts purchased and then all components being surface coating treated to remove friction to be optimal for endurance racing. This is not cheap or easy but its good

            BMW sells remanufactured oem transmissions - price is less than doing one up from scratch yourself.
            OBD1 M54/M52TU swap as a M50b25

            Z4 non powered steering rack fits e30



            Euro e46 2005/6 320d 6mt gearbox into E30 with M20 hardy and beck 1985 327s engine

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              #21
              Originally posted by S.J.1981 View Post
              This is indeed true, syncros are a wear item.

              Issue is, once you open up the gearbox, you may as well replace all the bearings. Those are not cheap, i calculated €1,337 just for the bearings. Then, replace all syncros is another €890 as well. So, we are just over €2K for just the parts, assuming nothing else is grinded, broken or needs replacing. Also required are a lot of big pulling tools, and some would need to be grinded down to fit between the gears.

              My local dealer offers €3.8K for a replacement transmission, taking in your old on (basically a rebuild) and you get a 2 year BMW warranty.

              So...what would you do?
              I would try out different fluid weights and/or MoS2 additive to see if that revives the transmission for a while. It's much easier and cheaper to change fluids than it is to change transmissions.

              Worked on my E36 M3's ZF transmission. 3rd gear would grind with every up shift. After trying MoS2, and driving for about 500 miles, it stopped grinding, and has been fine for 15,000 miles.

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                #22
                Reviving an old thread. I’m having this problem in first and second gears. Would this kit help?

                https://www.turnermotorsport.com/p-5...kaApebEALw_wcB

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