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Replacing input shaft seal

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    Replacing input shaft seal

    I've got a slow leak at my input shaft seal, and I probably need to get it taken care of soon. I'd like to do it myself if possible, but I've heard that it's a really difficult job, so I'm wondering if it's something I should take in to have done. I've done plenty of diffifcult jobs on the car before, including some very involved ones, so I'm wondering if it's something I can handle. What is involved in this job? Will I need special tools, or anything like that? Andrew and I are pretty capable of doing just about any repair on the car, so I guess I just need to know what needs to be done.

    #2
    Transmission has to come out, then you take the tube that goes around the input shaft off, the seal is in that tube/housing.

    It is probably also leaking from the large plug where the end of the 2ndary shaft is, just below the input shaft. This, unforutnatly, can't be resealed unless you just dump a bunch of epoxy over it or something.
    Adam Fogg- '88 M3

    Common sense- It's the new 'gifted'

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      #3
      Originally posted by AdamF 88iS
      Transmission has to come out, then you take the tube that goes around the input shaft off, the seal is in that tube/housing.

      It is probably also leaking from the large plug where the end of the 2ndary shaft is, just below the input shaft. This, unforutnatly, can't be resealed unless you just dump a bunch of epoxy over it or something.
      Huh, that really doesn't sound TOO bad. I've done much worse jobs. A transmission overhaul was one of those maintainence things I've been wanting to do, anyway.

      About sealing that secondary shaft, can that actually be done how you said? Like with epoxy or something of that nature? Or do I just kind of have to live with it?

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        #4
        Yea you can epoxy it, it has a little depressed area that can be cleaned and filled if you leave the transsmission standing up on the output flange as the epoxy dries.

        If you reseal the whole tranny, don't forget to change the detent plate on the top rear. This is often mistaken for selector seal leaks. An updated design of the plate is avalible.
        Adam Fogg- '88 M3

        Common sense- It's the new 'gifted'

        Comment


          #5
          Originally posted by AdamF 88iS
          Yea you can epoxy it, it has a little depressed area that can be cleaned and filled if you leave the transsmission standing up on the output flange as the epoxy dries.

          If you reseal the whole tranny, don't forget to change the detent plate on the top rear. This is often mistaken for selector seal leaks. An updated design of the plate is avalible.
          Got a part number for that, maybe a pic? I'd like to order everything I'll need ahead of time, so I can cut down on as much downtime as possible.

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            #6
            23 31 1 228 470
            Adam Fogg- '88 M3

            Common sense- It's the new 'gifted'

            Comment


              #7
              is the selector seal part number 27 on this page

              Comment


                #8
                Originally posted by ptownTSI
                is the selector seal part number 27 on this page

                http://www.realoem.com/bmw/showparts...54&hg=23&fg=15
                No, it's 17 on this picture.

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