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  1. #1
    Active Member One Ring
    Join Date
    Oct 11 2018
    AZ Member #
    428685
    Location
    Canada

    Rear Driveline clunk when accelerating while moving and are 97/01 rear driveshaftsame

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    I am experiencing a rear Driveline clunk (barely audible inside Abit more noticeable outside) this happens with slightly more aggressive acceleration while already at speed (the clunk does not happen no matter how hard I accelerate if I'm at a stand still) I am assuming it is the rear driveshafts? I am very open to others opinions though if you might know what it is. My second question is since I have a 1997 A4 2.8 auto with Quattro I was wondering if that rear driveshafts is compatible with my 2001 A4 2.8 auto with Quattro. Thanks in advance for the help!

  2. #2
    Veteran Member Four Rings walky_talky20's Avatar
    Join Date
    Jun 30 2008
    AZ Member #
    30427
    Location
    Erie, Pennsylvania

    The clunk could be your differential mount. The nose of the diff can actually hit the floor if the front mount gets sloppy enough. It can also be excessive backlash within the rear diff itself. This seems to be sort of common on aging B5's in general. You can of course check the CV joints for play as well. On an older car there is likely a combination of all of those things. I will say that the inner joint on the Left Hand rear axle is probably the highest failure rate of the rear CV joints. This is due to it's proximity to the exhaust pipe. Tends to bake the grease.

    The rear axles are all the same on quattro B5's, except the S4's which use larger inner joints (108 instead of the 100mm joints). Even then you just swap the axle cups and everything works.
    ^Don't listen to this guy, he's not even a mechanic.
    2001 Laser Red A4 1.8TQM, 5-Speed Swapped, 4.11 Final Drive, APR 93, R8 coil packs, Labree HFC & DP, 2.5" Exhaust, ST Coilovers, 034 RSB, A8 Brakes Front & Rear, 18" RS4 Reps
    2006 Passion Red Volvo V50 T5 AWD 6MT
    "You need to know what you are doing...Its like a rainbow jungle in there." - Redline380



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