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Will a '91 318i Getrag 240 Manual Transmission work with an M20?

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    Will a '91 318i Getrag 240 Manual Transmission work with an M20?

    I'm trying to do a 5 speed swap on my 1990 325i automatic. I have a 91 318i with a manual transmission (it should be a Getrag 240 right?) that I would like to put in my 325i.
    I've read a lot on the forums and some say the G240 will bolt up just fine to an M20 (ex: "E30 318i/is '91: Getrag 240 but with a bellhousing that fits the M20/M50/M42 motors...") and some say it won't (ex: "...for your m20 you'll need a g260 off an m20 if you want the gearbox to bolt up fine on the correct angle.")

    Has anyone actually put a G240 behind an M20? Does it work? Are there other things I have to do to get it to fit correctly? Are there downsides to having the G240 behind a 6 cylinder? (I know the gearing is a bit different)

    And if it does work, how much from the 318i can I swap to my 325i? (driveshaft? clutch? shift linkage? etc.)

    Thanks,

    Luke

    #2
    it will fit but I think the angles will be wrong, it's got the same bolt pattern as an M50 trans (clocked another 10 degrees to the passenger side).
    Build thread

    Bimmerlabs

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      #3
      The angles will be wrong? What do you mean? Like the whole transmission would be twisted 10 degrees? So it won't work? :(

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        #4
        yeah, the trans will be clocked 10 degrees towards the drivers side. it will still work, technically, you just have to get creative with mounts and shifter assemblies. just like using a Getrag 260 on an M50 swap.
        Build thread

        Bimmerlabs

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          #5
          Interesting. Ok, well I can get creative :)

          Do you know if the driveshaft and other stuff will swap over fine? I'll need a new clutch right?

          Comment


            #6
            AFAIK you have to use the driveshaft etc that goes with the transmission. I think you can use the M20 clutch, but you have to use the M20 flywheel and matching TOB. same with using the M42 clutch.
            Build thread

            Bimmerlabs

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              #7
              Ok. So I don't have an M20 clutch or flywheel because the 325i is an automatic. But I have the clutch and flywheel from the 318i (M42). Will that work on the M20? Or should I buy a new clutch and flywheel for an M20?

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