Vibration while in 2nd gear ?

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  • Jean
    Moderator
    • Aug 2006
    • 18228

    #1

    Vibration while in 2nd gear ?

    Hoping that someone here would point me in the right direction. I noticed that under wot acceleration through the gears, car vibrates more in 2nd gear than in any other gear. I can accelerate through the 1st to redline fine, go to 2nd and in the second half of the rpm range to the redline car vibrates. If I let off the gas it's fine, if I take it to redline and then shift into 3rd it goes away.

    I thought it might be something with the rear end but it doesn't make sense for it to do that only in 2nd, and not in every gear.

    Ideas ?

    (just got an idea to try going 1st to 3rd and see if it vibrates the same at the specific mph range, while going through 3rd gear instead of 2nd. I just had wheels/tires mounted and maybe it has something to do with that )
    Mtech1 v8 build thread - https://www.r3vlimited.com/board/sho...d.php?t=413205



    OEM v8 manual chip or dme - https://www.r3vlimited.com/board/sho....php?p=4938827
  • AndrewBird
    The Mad Scientist
    • Oct 2003
    • 11892

    #2
    I would say either flex disk or center support bearing. They are picky about what gear you are in for some reason. Have you ever replaced them?

    Comment

    • Jean
      Moderator
      • Aug 2006
      • 18228

      #3
      The flex disc was changed with the flywheel/clutch job along with urathane tranny mounts. The center support bearing i didn't change and have no records on if it was ever changed by the p.o.
      Mtech1 v8 build thread - https://www.r3vlimited.com/board/sho...d.php?t=413205



      OEM v8 manual chip or dme - https://www.r3vlimited.com/board/sho....php?p=4938827

      Comment

      • Jean
        Moderator
        • Aug 2006
        • 18228

        #4
        Vibration occurs at about 30-40mph at about 3500-4000rpm, that's the most noticable spot. Not as noticable if I skip 2nd, 1 to 3.
        Mtech1 v8 build thread - https://www.r3vlimited.com/board/sho...d.php?t=413205



        OEM v8 manual chip or dme - https://www.r3vlimited.com/board/sho....php?p=4938827

        Comment

        • Rennsport
          R3VLimited
          • May 2006
          • 2139

          #5
          center support will give you hell during heavy load, normal driving it wont cause any vibration (unless its completely shot of course)
          m106 1990 e30
          e36 daily
          e32 cruiser

          Comment

          • Mike325
            No R3VLimiter
            • Mar 2006
            • 3685

            #6
            Does the shifter shake too? My flex disk was bad and would skake the car in first and second. It was because the shifter rod was hittling the flex disk. Get under the car real quick and take a look at it.
            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

            • golfdmb18
              E30 Modder
              • Dec 2005
              • 886

              #7
              Like everyone else said...most likely your guibo

              Comment

              • Jean
                Moderator
                • Aug 2006
                • 18228

                #8
                Originally posted by golfdmb18
                Like everyone else said...most likely your guibo
                center support actually, guibo or flex disk is brand new.
                Mtech1 v8 build thread - https://www.r3vlimited.com/board/sho...d.php?t=413205



                OEM v8 manual chip or dme - https://www.r3vlimited.com/board/sho....php?p=4938827

                Comment

                • Jean
                  Moderator
                  • Aug 2006
                  • 18228

                  #9
                  Originally posted by Mike325
                  Does the shifter shake too? My flex disk was bad and would skake the car in first and second. It was because the shifter rod was hittling the flex disk. Get under the car real quick and take a look at it.
                  shifter does shake a little, but it's done that since I replaced worn tranny bushings with ie urethane bushings. i'll get under the car this weekend and see what I find out...is there a procedure to check for sure if it's the center support that needs to be replaced ? just look for wear or play ?
                  Mtech1 v8 build thread - https://www.r3vlimited.com/board/sho...d.php?t=413205



                  OEM v8 manual chip or dme - https://www.r3vlimited.com/board/sho....php?p=4938827

                  Comment

                  • Jean
                    Moderator
                    • Aug 2006
                    • 18228

                    #10
                    About to order a new center support bearing , does it matter what brand it is , I see a couple different ones on BMAparts.com
                    Mtech1 v8 build thread - https://www.r3vlimited.com/board/sho...d.php?t=413205



                    OEM v8 manual chip or dme - https://www.r3vlimited.com/board/sho....php?p=4938827

                    Comment

                    • Ryan Stewart
                      I Love Miatas
                      • Oct 2003
                      • 8978

                      #11
                      U-joint
                      /thread.

                      You can waste time replacing the CSB but the CSB goes bad when the U-joint gets stiff and wears it out. Then the symptom is usually a bearing noise under load. Replace the bearing and the vibration should be much worse and more noticable at slower speeds.

                      Then its new driveshaft time (or rebuild if you have a rebuilt d-shaft but then yours joint wouldnt be shit yet).

                      New CSB usually comes with a driveshaft.
                      Im now E30less.
                      sigpic

                      Comment

                      • Jean
                        Moderator
                        • Aug 2006
                        • 18228

                        #12
                        Is u-joint seperate from the driveshaft or it's not removable by itself ? I have autox coming up next weekend, not feeling good about this.

                        I am starting to hate this car :(
                        Mtech1 v8 build thread - https://www.r3vlimited.com/board/sho...d.php?t=413205



                        OEM v8 manual chip or dme - https://www.r3vlimited.com/board/sho....php?p=4938827

                        Comment

                        • JGood
                          R3V OG
                          • Jan 2004
                          • 7959

                          #13
                          I assume you removed the driveshaft. when you reinstalled it, did you preload the CSB to the front 4-6mm? I killed 4 or 5 of them on various e30's by not doing that, but since I started doing that I've had no problems.
                          85 325e m60b44 6 speed / 89 535i
                          e30 restoration and V8 swap
                          24 Hours of Lemons e30 build

                          Comment

                          • Jean
                            Moderator
                            • Aug 2006
                            • 18228

                            #14
                            Originally posted by JGood
                            I assume you removed the driveshaft. when you reinstalled it, did you preload the CSB to the front 4-6mm? I killed 4 or 5 of them on various e30's by not doing that, but since I started doing that I've had no problems.
                            I have not removed the driveshaft, a shop replaced the clutch and flywheel (don't know if it was removed then or not, does it have to be?) and I have replaced the open diff with an lsd diff but did not have to remove the driveshaft.

                            Maybe I should take it to a shop and pay for inspection .:(
                            Mtech1 v8 build thread - https://www.r3vlimited.com/board/sho...d.php?t=413205



                            OEM v8 manual chip or dme - https://www.r3vlimited.com/board/sho....php?p=4938827

                            Comment

                            • Mike325
                              No R3VLimiter
                              • Mar 2006
                              • 3685

                              #15
                              You do have to undo the csb to do the trans, so the shop may have put it on wrong.
                              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

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