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  • #1

    New rear end trouble...

    Hey, I put in a new rearend with 3:42's. We did it at a shop. Had two good mechanics helping me. Did everything right, everything is tightened as it should be and I have a really bad thump from the right side. Going over bumps. Alsmost sounds like an exaust rattle, but we didnt even mess with it. Anyone have this problem? It was a straight swap out, 99 rear with 3:08's to a 00' LDS w/ 3:42's. Axle has 26,000 miles on it. Sounds like someone is hitting the right rear underside with a mallet.
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  • #2
    put it back up in the air on the lift and inspect it......use a jack stand and raise the rear from the center and see whats hitting...

    The Goldens: Reno and Rocky

    2008 C6, M6, LS3, Corsa Extreme C/B, (it flys) & 2008 Yukon loaded (Titanic), 03 Ford Focus..everydaydriver.

    Wolfdog Rescue Resources, Inc.:http://www.wrr-inc.org
    Home Page: http://www.renokeo.com
    sold: 97 Firehawk, 97 Comp T/A, 2005 GTO, 2008 Solstice GXP turbo.

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    • #3
      Could be a mount. Did you use all new mounts? Did you be sure to bolt the torque arm down? Is your exhaust hitting off that plate? There is a plate... Look under the p/s. Mine was bouncing up and down on it after my header install. I just took it off. It goes right where the catback starts, right under it. Or in that area, I can't remember. I had the same problem.
      97 Chevy 'Raro Z28 M6- Ported & Polished LT1 heads,beehives,1.6/1.94 valves, 226/231 custom cam,K&N FIPK, 94-95 BBK shorty's,ORY,Magnaflow Catback,no cats,BMR LCA Relocation Brackets,Lower Control Arms,Adjustable Panhard Bar,Eibach Pro Kit,SPEC Stage 1,Walbro 255 Fuel Pump,30LB Injectors,Pro 5.0,Short stick,MSD 8.5's,NGK TR55's,LT4KM

      01 Honda CBR600 F4i-Two bro's,Corbins,SS brake lines

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      • #4
        I can't get it on the lift until next weekend with my work schedule, so I have to put up with it till then

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        • #5
          Also watch the I pipe going over the axel - might be hitting there with the new rear end.
          Silver 02 WS-6, 6 speed, Corsa cat-back, SLP lid, K&N filter, BMR STB, !CAGs, Lou's short stick, MSD wires, MTI "Hammer" cam, ASP underdrive pulley, Hooker LTs, Hooker ORY, Comp 918s, TR pushrods, UMI Sfcs, UMI LCAs, NGK TR55s, Hotchkis springs



          Dyno'd 4/24: 330.9 RWHP/ 344.8 RWTQ (Before cam, headers, and pulley)

          Dyno'd 5/1: 383.5 RWHP / 380.5 RWTQ (393 actual RWHP)

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          • #6
            I thought of that too, it checked out ok. I dunno, somethings not right.

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            • #7
              Try looking under it yourself as she sits? Maybe the problem is that obvious, maybe you will be able to determine the cause of bump just by taking a quick peek.
              But untill you can look and fix the issue watch the big bumps

              AMF RACING: Friends don't let friends drive junk

              01 black ss #0966
              lou's short stick, slp lid and cold air, smooth bellow, centerforce, loudmouth, 3 in. y pipe, flowtech long tubes, BMR STB, SLP 4.10's, polished zr-1s, MSD wires, T-6 plugs, and upcoming goodies....Tee-Hee

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              • #8
                I did have a problem with the R R caliper setup. The outer pad was set wrong. Got that fixed, but the rattle still is there. I even checked the spare to make sure it was not loose. A mystery............

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