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Thread: Loud clunks over bumps that are *worse* at low speed

  1. #1
    LH Electronics Specialist
    Join Date
    Feb 2008
    Location
    Dallas, Texas
    Posts
    1,147

    Question Loud clunks over bumps that are *worse* at low speed

    The Special purrs on at 240K but not so much over broken pavement. I've got a very loud clunk that is worse if wheel impacts happen on the driver's side. New struts and isolators have not fixed it. If I accelerate HARD into a turn, the knock is greatly reduced and the whole car feels tighter.

    What's new:
    Strut mounts (Moog, 70ft-lb verified on the strut nut)
    Struts (KYB Excel G)
    Isolators (Moog rubber parts)
    Lower control arms (weren't bad but they had 240K and the consequence of failure is possible death and mayhem if it happens on a fast road like the Dallas North Tollway)
    Rear lateral links (old ones were seized)

    What's new-ish:
    Tie rods, inner and outer, 40K.
    Sway bar end links, front and rear, 20K.

    What's OEM:
    Springs
    Subframe bushings - appear OK.
    Tension strut bushings - appear OK.
    Steering rack

    If I turn the wheel with the car parked, there is a pretty loud clunk in the steering. Rack motion appears to be well damped by the bushings so I'm thinking either a rack or the thing that couples the rack to the steering shaft. Would this explain the noise over bumps as well?

    I can provide videos if need be.
    2004 300M Special...240,600 miles!
    Suspension overhaul in progress. Electrical gremlin extermination in progress.

  2. #2
    Junior Member
    Join Date
    Aug 2016
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    6

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    I had a similar issue with my 00 LHS, it turned out to be a loose brake caliper that eventually just fell off and ground into the wheel. For weeks before that it made a very similar noise as to what your describing.

  3. #3
    Farthest North hrmwrm's Avatar
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    Jun 2009
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    Sangudo,AB
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    Default

    sway bar bushings can make terrible noise if their loose.
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  4. #4
    Imported. From Detroit. Sneke_Eyez's Avatar
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    Oct 2007
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    Bahston.
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    Default

    I'd start with swaybar bushings if they've never been done.

    Bad swaybar endlinks make all kinds of weird and strange noises when they're bad, and my experience with any brand other than Moog has not been good (and even those don't last as long as I want them to).
    ES: September 2009 LHOTM || 2010 LHF LH of Carlisle || 2nd Place Carlisle Showfield 2013
    Concorde: 3rd Place Carlisle Showfield 2012

    The Summer Playtoy - 2002 Dodge Intrepid ES || The DD - 2004 Chrysler 300M Special - No sig yet, but it does have 300S 20s!
    1974 Dodge Dart Swinger || 1969 Dodge Coronet 440 Coupe
    Her DD - 2001 Chrysler Concorde LXi || Mom's: 2004 Chrysler 300M /2003 Chrysler 300M 24k mi!
    Sold with 167k, but not forgotten: 2001 Dodge Intrepid SE

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