Oscillating clunk from rear end

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  • funcrew
    E30 Fanatic
    • Jun 2007
    • 1223

    #1

    Oscillating clunk from rear end

    When I'm at low RPM and low load, like rolling 10mph in traffic, slight throttle-on/throttle-off inputs cause a nasty clunk in the rear end. If I'm right at that wishy-washy place in between throttle on and throttle off, it sets up an alarming clunk/clank-clunk/clank etc. oscillation for a few seconds. Never happens under heavy acceleration or deceleration, or at high speed or RPM.

    LSD diff works smooth and silent, no internal problems.

    So what do you think - differential bushing? Something else?
    "If the sky were to fall tomorrow, the tall would die first."

    -Dr. Paul Forrester



    Do I LOOK like I need a psychological evaluation???
  • jlevie
    R3V OG
    • Nov 2006
    • 13530

    #2
    It could be anything in the rear suspension or drive train. Get the car up in the air and carefully inspect everything for wear/play.
    The car makes it possible, but the driver makes it happen.
    Jim Levie, Huntsville, AL

    Comment

    • KillaCam
      R3VLimited
      • Jun 2009
      • 2103

      #3
      I have the same prob i think it is my rear sub bushing
      Originally posted by E30_(1st Musk)_
      HONDA IS WHERE EVERY TREND DIES! .

      24v swap Oil Pan..F/S

      Comment

      • Wh33lhop
        R3V OG
        • Feb 2009
        • 11705

        #4
        If I were you I'd inspect all your bushings back there.
        paint sucks

        Comment

        • funcrew
          E30 Fanatic
          • Jun 2007
          • 1223

          #5
          So essentially the answer is that there's nothing wrong that couldn't be fixed by the skillful application of a high limit credit card?
          "If the sky were to fall tomorrow, the tall would die first."

          -Dr. Paul Forrester



          Do I LOOK like I need a psychological evaluation???

          Comment

          • ak-
            R3V OG
            • May 2009
            • 12422

            #6
            I have the same problem.
            Let's start a club guys!

            1991 325iS turbo

            Comment

            • Mike325
              No R3VLimiter
              • Mar 2006
              • 3685

              #7
              Originally posted by funcrew
              So essentially the answer is that there's nothing wrong that couldn't be fixed by the skillful application of a high limit credit card?
              If you can do it yourself, and this seems like a classic case of bad rear subframe bushings, you could do this repair for about $100-$150. Then add in for all the beer.
              Originally posted by cabriodster87
              "Honey? What color is this wire? Is it the same as that one? Are you sure? I don't believe it. OK, it works. Thank you sweetie."
              Originally posted by Kershaw
              i've got a boner and a desire to speed.

              Comment

              • BigD
                E30 Enthusiast
                • Jul 2006
                • 1085

                #8
                The problem in my car turned out to be backed out LSD bolts, and the clunking was the ring/pinion chewing on the bolts. Until one bolt head finally became embedded in one of the gear teeth and the clunking became epic, there were no real symptoms - LSD worked fine, wheels spun smooth...





                Comment

                • a3ternus
                  Mod Crazy
                  • Nov 2003
                  • 643

                  #9
                  Originally posted by BigD
                  The problem in my car turned out to be backed out LSD bolts, and the clunking was the ring/pinion chewing on the bolts. Until one bolt head finally became embedded in one of the gear teeth and the clunking became epic, there were no real symptoms - LSD worked fine, wheels spun smooth...
                  Can you please explain more?
                  I know I m a bit technically challenged but this clunk is happening to my car too,
                  even though it doesnt have to do with the lsd or the old diff I had in the car.
                  After the swap it remained the same.After the guibo change still its there.
                  I know,old thread,but...:!:
                  N.
                  Your signature picture has been removed since it contained the Photobucket "upgrade your account" image.

                  Originally Posted by aaron_silva
                  It is always frustrating having a harsh ride when
                  you arent in the right mind set.

                  Comment

                  • Dude
                    Banned
                    • May 2010
                    • 1119

                    #10
                    Jack up the rear end, pull off the wheels, and inspect everything. Theres a good chance you will be able to find it. Also make sure your lugs are tight, a few times after taking off and putting back on the wheels the bolts need to be retorqued. First few times ive taken my wheels off i was dumb enough to completely forget to tighten them back up in the first place, scary.

                    Comment

                    • a3ternus
                      Mod Crazy
                      • Nov 2003
                      • 643

                      #11
                      Originally posted by Dude
                      Jack up the rear end, pull off the wheels, and inspect everything. Theres a good chance you will be able to find it. Also make sure your lugs are tight, a few times after taking off and putting back on the wheels the bolts need to be retorqued. First few times ive taken my wheels off i was dumb enough to completely forget to tighten them back up in the first place, scary.
                      LOL Last night I tested by reaching Vmax! An astonishing 205km/h and thats with a 4.27 and a mighty M10! :D:up:
                      Not a lot of vibration or noise even at that speed.
                      Now,all I need is to get sure my wheels bolts are tightened! :p
                      N.
                      Your signature picture has been removed since it contained the Photobucket "upgrade your account" image.

                      Originally Posted by aaron_silva
                      It is always frustrating having a harsh ride when
                      you arent in the right mind set.

                      Comment

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