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Old 06-13-2013, 03:28 AM
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Question 2001 WJ Knocking sound at the rear when going over mild bumps

I'm at a loss. I've replaced my front and rear Sway Bars with new sturdier ADCO's. Also new Bilsteins. The garage has checked every bush and bolt on the front and rear suspension. Steering damper replaced. Drive shaft checked. Wheel bearings. We've tried everything but it's still there. I can't hear it when I go over a single speed bump but it's when I'm driving over a series of traffic calming bumps (for example) which are in rows before you hit a speed bump (if that makes sense). I've even checked to see if the tailgate is loose or the spare wheel perhaps but all good. Any idea what this could be?
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Old 06-14-2013, 02:00 AM
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Re: 2001 WJ Knocking sound at the rear when going over mild bumps

Welcome to the garage.
The rear shock bolts are known to be a bit undersized, which can cause knocking sounds. If not this, the upper control arm ball joint could have some play.
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Old 06-14-2013, 08:50 PM
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Re: 2001 WJ Knocking sound at the rear when going over mild bumps

You mentioned having Addco sway bars. I just added a rear one and had a knock immediately after I installed it. It turned out that the ends of the bar were hitting the sleeve inside the bushing of the sway bar end links on each side. I put a washer as a spacer on each side inbetween the sway bar and the endlink and the knocking is gone.
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Old 06-14-2013, 09:48 PM
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Check your rear shock bolts I had a clunking sound when I would go over bumps checked my rear shock bolts and my upper back right bolt was loose I tightened it up and stopped clunking so try that

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