Rear rattling like crazy...

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  • BENdashdash
    Tom is not my friend
    • Aug 2004
    • 2506

    #1

    Rear rattling like crazy...

    The passenger side of my rearend is rattling like mad whenever I hit any bumps. I just replaced both rear shock mounts, but its still shaking. When taking my local bumpy road fast, the suspension shakes so much that I lose some of my steering control. I looked under that car and did not see any obvious problem (all the bolts look tight). I have no idea of whats causing this. Any ideas would be appreciated.
  • Jordan
    R3V OG
    • Oct 2003
    • 12907

    #2
    diff bolts
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    • BENdashdash
      Tom is not my friend
      • Aug 2004
      • 2506

      #3
      I checked them and they seem tight. They're very hard to reach but from what I could tell, they looked fine.

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      • BahnE30
        E30 Enthusiast
        • Oct 2003
        • 1050

        #4
        like Jordan said, "Diff bolts" get a wrench on them i bet you'll get 1/4 to 1/2 a turn on some of them. You can't tell if a bolt is tight just by looking at it. AFAIK

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        • BENdashdash
          Tom is not my friend
          • Aug 2004
          • 2506

          #5
          I tried tightening them, but their locations are so awkward that I couldn't get all my muscle into it. I'll have to find a torque wrench...

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          • e30excel
            Member
            • Oct 2004
            • 73

            #6
            i was also going to diff bolts, try to find a way to get some torque applied on them
            www.driftunit.com and www.excelfundamentals.com <--- supporter and admin

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            • Jand3rson
              Banned
              • Oct 2003
              • 37587

              #7
              Jack up the rear of the car as high as you SAFELY can, and it it on jack stands. You should be able to give yourself enough room to get under the car comfortably and have enough leverage to get all the bolts.

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              • Kondour
                Wrencher
                • Dec 2003
                • 243

                #8
                on the rear half of the car, there are reinforcements for jackstands.... there are 2 allen bolts that come loose often, and i had a similar problem, found out they were loose and tightened them and all is good now....

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                • DEV0 E30
                  R3V OG
                  • Oct 2004
                  • 8816

                  #9
                  Make sure your exhuast is securely attached. I drove around my 84 eta a little bit just to see how much I liked it and I found out the entire exhaust isn't secure at all.
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                  • BENdashdash
                    Tom is not my friend
                    • Aug 2004
                    • 2506

                    #10
                    Originally posted by Eurospeed88
                    Jack up the rear of the car as high as you SAFELY can, and it it on jack stands. You should be able to give yourself enough room to get under the car comfortably and have enough leverage to get all the bolts.
                    We're talking about the bolts that hold the diff in, right? I jacked it way high, but I was simply unable to get the torque I needed due to the awkward loactions of the bolts and the angles needed to spin them. I'm not much of a mechanic (yet) but I'm guessing reaching bolts such as these is a common problem. I don't have access to a torque wrench as of yet, but I'm working on it...

                    Originally posted by Kondour
                    on the rear half of the car, there are reinforcements for jackstands.... there are 2 allen bolts that come loose often, and i had a similar problem, found out they were loose and tightened them and all is good now....
                    I just checked mine, they're tight.

                    Originally posted by eightyfoure
                    Make sure your exhuast is securely attached. I drove around my 84 eta a little bit just to see how much I liked it and I found out the entire exhaust isn't secure at all.
                    The issue is on the other side of the car, but its tight nonetheless.

                    Thanks for all your suggestions so far.

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                    • chrisd
                      Wrencher
                      • Oct 2003
                      • 288

                      #11
                      Re: Rear rattling like crazy...

                      Originally posted by btm4k
                      The passenger side of my rearend is rattling like mad whenever I hit any bumps. I just replaced both rear shock mounts, but its still shaking. When taking my local bumpy road fast, the suspension shakes so much that I lose some of my steering control. I looked under that car and did not see any obvious problem (all the bolts look tight). I have no idea of whats causing this. Any ideas would be appreciated.
                      Stereo obviously not loud enough. simple fix. :)

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                      • Kruzen
                        R3V Elite
                        • Mar 2004
                        • 5603

                        #12
                        Re: Rear rattling like crazy...

                        Originally posted by chrisd
                        Originally posted by btm4k
                        The passenger side of my rearend is rattling like mad whenever I hit any bumps. I just replaced both rear shock mounts, but its still shaking. When taking my local bumpy road fast, the suspension shakes so much that I lose some of my steering control. I looked under that car and did not see any obvious problem (all the bolts look tight). I have no idea of whats causing this. Any ideas would be appreciated.
                        Stereo obviously not loud enough. simple fix. :)
                        truth.

                        squeeky brakes? *turns up the music*
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                        • BENdashdash
                          Tom is not my friend
                          • Aug 2004
                          • 2506

                          #13
                          AHA! I found the problem when probing the trunk. The frame for the battery weight is cracked (my battery is under the hood). The weight is not secure which is causing it to jump. The weight is very heavy.. have any of you taken yours out? If so, do you notice a handling difference?

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                          • Addissimo
                            E30 Mastermind
                            • Mar 2004
                            • 1820

                            #14
                            I've heard alot about this thing... but am yet to find it. Where is it? I'll go look and see if I have one or not.

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                            • BENdashdash
                              Tom is not my friend
                              • Aug 2004
                              • 2506

                              #15
                              Originally posted by Addissimo
                              I've heard alot about this thing... but am yet to find it. Where is it? I'll go look and see if I have one or not.
                              If you don't have a battery in your trunk, it should be there. However, I've heard its just a cabrio thing. Anyway, its beneath the liner. There is a metal cover with four bolts. Pull the bolts and cover off and underneath you should find a boxy 50-pound weight.

                              For now I removed the weight. This makes the passenger side a bit higher, but its small beans compared to the previous problem. In the near future I'll either fix or create my own mount for the bolts.

                              I drove the car around a bit sounds and steers MUCH better. I did, however, notice a different rattling noise coming from the front passenger side. It sounds minor though...

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