Drive shaft coupling nut

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  • 2002tiiguy
    E30 Addict
    • Jul 2013
    • 467

    #1

    Drive shaft coupling nut

    im trying to get the one on my car loose. bent a screw driver in the u joint tryin to turn it either way, so im thinking i wasnt on the nut. anyone have a breakdown of that assembly? Real oem doesnt have a diagram that i could find. any help appreciated.
  • The Dark Side of Will
    R3VLimited
    • Jun 2010
    • 2796

    #2
    Are you trying to get the coupling nut loose or just get the driveshaft out?

    There's enough travel in the plunge fitting to get the guibo out of the front and disengage it from the T-case and drop it.

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    • 2002tiiguy
      E30 Addict
      • Jul 2013
      • 467

      #3
      I have a vibration that is present while I have no load on the shaft, if I pull my foot off the gas pedal while in gear it vanishes. If I accelerate, it lessens. I tried with a pipe wrench to turn the nut and I bent the screwdriver I had in the u joint holding it from turning

      Comment

      • TravisAsch
        Noobie
        • Jul 2015
        • 34

        #4
        Could be the CCB

        Comment

        • 2002tiiguy
          E30 Addict
          • Jul 2013
          • 467

          #5
          If it had one

          Comment

          • TravisAsch
            Noobie
            • Jul 2015
            • 34

            #6
            Much to learn lol!

            Comment

            • 2002tiiguy
              E30 Addict
              • Jul 2013
              • 467

              #7
              Lol yea, ix's are 1 piece and only 1 u joint right at the diff

              Comment

              • The Dark Side of Will
                R3VLimited
                • Jun 2010
                • 2796

                #8
                You don't need to loosen the coupling nut.
                Typically the rear U-joint wears out... and there really isn't anything to do about except throw down $700 for a new shaft.

                BMA has a replacement U-joint, but there's fairly ticklish machining involved in replacing it.

                Comment

                • 2002tiiguy
                  E30 Addict
                  • Jul 2013
                  • 467

                  #9
                  Vibration kinda started after swapping my tc, im more like hoping that it's the coupling :P

                  Comment

                  • flyboyx
                    R3V OG
                    • Sep 2008
                    • 8371

                    #10
                    when you say coupling, are you talking about the guibo?
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                    • 2002tiiguy
                      E30 Addict
                      • Jul 2013
                      • 467

                      #11
                      Nope, the one in the back, I'm very familiar with guibos if your putting the 8 bolt one in a 2002, make sure the band stays on until it's installed :P but I do wonder. If the u joint or coupling is loose and the d shaft is vibrating back there, do you think I would be able to feel it in the shifter?

                      Comment

                      • ghatid
                        Advanced Member
                        • Sep 2013
                        • 151

                        #12
                        Originally posted by 2002tiiguy
                        Nope, the one in the back, I'm very familiar with guibos if your putting the 8 bolt one in a 2002, make sure the band stays on until it's installed :P but I do wonder. If the u joint or coupling is loose and the d shaft is vibrating back there, do you think I would be able to feel it in the shifter?
                        Okay, I'm no pro, just know stuff from working on my own cars, but from what you're trying, it seems like it's not your driveshaft. I also may have misunderstood your question but:

                        It's possible that you'd feel vibration in your shifter, but my guess is that if your ujoint is loose/bad, you'd feel it in the whole car, not just the shifter. The easiest way to check is if you just climb under your car (all 4 wheels on the ground and e-brake on) and try to shake the driveshaft. If you can make it move in any direction other than the twisting motion, somethings wrong.

                        What drive shaft coupling nut were you trying to loosen, this one: http://s614.photobucket.com/user/dan...haft.jpg.html?

                        Comment

                        • 2002tiiguy
                          E30 Addict
                          • Jul 2013
                          • 467

                          #13
                          Yup that one, it's just frozen, ill have to get it moving again

                          Comment

                          • ghatid
                            Advanced Member
                            • Sep 2013
                            • 151

                            #14
                            Originally posted by 2002tiiguy
                            Yup that one, it's just frozen, ill have to get it moving again
                            Sounds like it. If your car is on the ground, I don't think you need to ruin any more screwdrivers loosening it.

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