Replacing the Guibo/Flex Disc & CSB - What Else?

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  • bcrdukes
    Advanced Member
    • Jun 2009
    • 107

    #1

    Replacing the Guibo/Flex Disc & CSB - What Else?

    Hi guys,

    I'm going to be replacing the guibo and CSB for my tranny/driveshaft soon. In addition to this, the tranny mounts and tranny rear main seal.

    What else is there? U-joints?

    Thanks.
    1989 E30 BMW 325i
    1998 E36 BMW M3
    2004 E46 BMW 325i
  • dashboardmonkey
    FUCK YOUR WAFFLES
    • Jun 2008
    • 6158

    #2
    if you are replacing the drive shaft you will be replacing the u-joints.

    Do your motor mounts as well
    -Andy

    Comment

    • dashboardmonkey
      FUCK YOUR WAFFLES
      • Jun 2008
      • 6158

      #3
      if you are replacing the drive shaft you will be replacing the u-joints.

      Do your motor mounts as well
      -Andy

      Comment

      • jlevie
        R3V OG
        • Nov 2006
        • 13530

        #4
        Close, the u-joints aren't a field replaceable item. So you'll be replacing the drive shaft with a new or reman unit.
        The car makes it possible, but the driver makes it happen.
        Jim Levie, Huntsville, AL

        Comment

        • bcrdukes
          Advanced Member
          • Jun 2009
          • 107

          #5
          ^
          Really?

          I did a search and it seems like many people have replaced the u-joints either themselves or at a shop. Pelican Parts and BMA also sell the u-joint. The funny thing is BMA lists that you need 3 per car but no mention of such on Pelican. Hmm...
          1989 E30 BMW 325i
          1998 E36 BMW M3
          2004 E46 BMW 325i

          Comment

          • jlevie
            R3V OG
            • Nov 2006
            • 13530

            #6
            A BMW drive shaft has the u-joints staked or welded in, which complicates replacement. And after replacing the u-joints the drive shaft needs to be balanced.
            The car makes it possible, but the driver makes it happen.
            Jim Levie, Huntsville, AL

            Comment

            • bcrdukes
              Advanced Member
              • Jun 2009
              • 107

              #7
              So bottom line is pull out the drive shaft and either replace with a new one or remanufactured one, correct?
              1989 E30 BMW 325i
              1998 E36 BMW M3
              2004 E46 BMW 325i

              Comment

              • jlevie
                R3V OG
                • Nov 2006
                • 13530

                #8
                Yep!
                The car makes it possible, but the driver makes it happen.
                Jim Levie, Huntsville, AL

                Comment

                • JGood
                  R3V OG
                  • Jan 2004
                  • 7959

                  #9
                  Does your driveshaft even need replaced? It is possible to have a worn guibo and CSB without having a bad driveshaft. When the guibo fails, the CSB will be right behind, and vice versa.

                  Get new bolts for the guibo. 6 bolts, 6 nuts. Used ones can work loose if reinstalled.

                  Don't forget to pre-load the CSB, I think forward 4-6mm IIRC.

                  And don't forget whatever exhaust hardware/gaskets you'll need when you drop the exhaust to get to the driveshaft. That hardware gets rusty and will probably break/strip.
                  85 325e m60b44 6 speed / 89 535i
                  e30 restoration and V8 swap
                  24 Hours of Lemons e30 build

                  Comment

                  • bcrdukes
                    Advanced Member
                    • Jun 2009
                    • 107

                    #10
                    Thanks JGood.

                    At this point, I'm only speculating whether or not I need to replace the driveshaft or not. Whenever I'm shifting into gears, primarily 1st, 2nd, and 3rd, I hear a clunk from the rear end of the car from the cabin. I need to further troubleshoot as to what needs to be replaced, but for one, the Guibo, CSB, and transmission rear main seal is definitely on the way out. I was thinking perhaps my drive shaft needs to be replaced in terms of preventative maintenance. After sifting through a few threads using the search, it appears that a u-joint that isn't replaced will wear out the CSB a lot quicker than expected.

                    Input much appreciated!
                    Last edited by bcrdukes; 06-26-2009, 11:20 AM.
                    1989 E30 BMW 325i
                    1998 E36 BMW M3
                    2004 E46 BMW 325i

                    Comment

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