misbehaving speedo

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  • tonytony
    Knee deep in poopie
    • Jan 2004
    • 3498

    #1

    misbehaving speedo

    so I just noticed how my speedo jumps when I shift. Like I'll take off in first gear and when I shift to second it jumps down a few mph and then jumps back up where it's suppose to be. What are some possible causes of this? This also happens when I shift to third, and happens more noticibly more when I drive hard.
  • Erick
    Official R3V Drifter
    • Oct 2003
    • 11169

    #2
    maybe you're looking at the tach instead? :P j/k.... no clue.

    I know my tach starts freezing when it's cold outside. It jumps rpms, or it stays stuck.
    Erick Mahle | FullOpp Drift | YouTube
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    Originally posted by Mr. Anderson
    ...one of the most hardcore E30's around. :D

    Comment

    • tonytony
      Knee deep in poopie
      • Jan 2004
      • 3498

      #3
      haha unless it's some wierdo car from overseas with the gauges switch than I suppose I'm looking at the wrong gauge :oops: but I'm positve the speedo is on the left haha :D

      Comment

      • chesster6969
        Grease Monkey
        • Oct 2003
        • 321

        #4
        Maybe its the speed sensor in the differential. It could be loose and everytime you shift a gear the driveline moves the sensor until it falls back into place.

        Just an idea ;)

        Comment

        • tonytony
          Knee deep in poopie
          • Jan 2004
          • 3498

          #5
          well my speedo finally went out today... :x

          Comment

          • kencopperwheat
            King of Kegstands
            • Oct 2003
            • 14396

            #6
            Change your SI batteries.
            Originally posted by Gruelius
            and i do not know what bugg brakes are.

            Comment

            • MattE30
              E30 Mastermind
              • Oct 2003
              • 1520

              #7
              Mine has the same problem, but if the si batteries were bad, wouldn't the tach not work either? My speedo, and odometer don't work.

              97 Cosmos M3

              Comment

              • kencopperwheat
                King of Kegstands
                • Oct 2003
                • 14396

                #8
                If the batteries aren't completely dead, things may still work a bit. I'd recommend changing them, and when you have the cluster out make sure that all of the grounding nuts on the back of the gauges are tight.
                Originally posted by Gruelius
                and i do not know what bugg brakes are.

                Comment

                • tonytony
                  Knee deep in poopie
                  • Jan 2004
                  • 3498

                  #9
                  hmm SI batteriest huh? I have no clue what they are. :?

                  Comment

                  • kencopperwheat
                    King of Kegstands
                    • Oct 2003
                    • 14396

                    #10
                    Originally posted by Gruelius
                    and i do not know what bugg brakes are.

                    Comment

                    • Matto
                      E30 Modder
                      • Jan 2004
                      • 800

                      #11
                      What the heck are you doing wearing a speedo anyways??? :x

                      Sorry I thought it was funny when i just read the title.

                      Comment

                      • tonytony
                        Knee deep in poopie
                        • Jan 2004
                        • 3498

                        #12
                        kool thanks I'll look into that when I have some time.

                        Comment

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