Lexus GX 2004-09 :: Clunk / Loose Suspension When Going Over Potholes


Dec 26, 2013

My 2006 Gx470 Sport (KDSS), with 82k miles, has a clunk/loose suspension feeling when going over potholes. It doesn't happen when going over speed bumps or anything other then a pothole.

I have experienced at each corner of the suspension, so it isn't just one corner that is bad. So if for example I drive over a pothole on the driver side, I feel the clunk on the driver front wheel as it goes into the pothole, and then again as the rear driver tire goes into the pothole. The same thing happens if I drove over a pothole on the passenger side as well.

Since it happens at all 4 corners, I am wondering if it may be something wrong with the Xreas Suspension, or KDSS.

Also, this is the first vehicle I have driven with KDSS, so maybe this is a normal feeling of that system. Everything else with the suspension feels normal.

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I crawled underneath and tried to find looseness in the suspension with no luck. The sway bar end links seem tight (compared to the MKV Jetta I also have), and the strut mounts do not seem to be loose.

What I did find were some suspect control arm bushings. I'm new to suspension noises in this platform, our MKV has been flawless for the past 7 years. Could these worn bushings cause a loose clunk?

I also checked the subframe bolts and fuel lines that come up in common searches.

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Lexus GX 2004-09 :: 2005 - Loose Steering At Speeds Above 100kph (60mph)

I was driving my mother's 05 GX (non-kdss suspension).

The steering seems to be quite loose at speeds above 100kph (60mph).

There is also a vibration at these speeds (likely relating to balance).

How tight is your steering?

If alignment/balance doesn't fix things, what other parts might be the culprit?

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Lexus RX 2004-09 :: Rear End Clunk On Passenger Side

I have had an issue with a clunk in the rear end. Passenger side. It was only happening when I would hit a bump. Over the last couple days it has started getting worse. At about 40 mph and above the clunking will increase and can be fairly rapid. Also have a slight vibration at that speed. Do not feel it in the steering wheel.

I think I have narrowed it down to the rear knuckle? bushing. While holding onto the bushing I rocked the top of the tire in and out to produce the clunk. I could feel it in that spot. I had ordered a set of bushings, months ago, which claimed to be a direct replacement.

Tonight I decided to try and swap them out. Should be easy. Nope. The old bushing will not come out. I have some pictures. Maybe I need to call my mechanic in the morning? My diagnosis might be wrong anyway?

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Lexus GX 2004-09 :: 2005 - Clunk Sound While Turning To The Right?

My 2005 GX (108k miles) seems to be in great shape. When i replaced the front CV boots i looked carefully at all suspension components and i did not see anything damaged, loose or suspicious.

However, when the truck is SLOWLY moving (entering into my driveway or getting out of parking spot), and when i turn the steering wheel ALL THE WAY to the right, i hear and almost feel a single semi-loud clunk from under the car. I am 99% sure it is related to the steering movement. When the car drives straight or when i am making smaller turns on the street, there is no clunk, noise or vibration at all. I haven't noticed it during U-turns yet, but maybe i haven't paid enough attention. Something must be loose or worn out. The clunk is very obvious when it happens.

Where this could be coming from? Any well known weak components in the front suspension setup that may need attention at 108k miles? I am thinking about tie rod ends or sway bar links but i am not sure if a bad tie rod / link would produce such "clunk" when turning all the way.

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Will this cause any issues with the vehicle if drive shaft is not replaced? Is it just annoying? Is there any chance that Lexus will fix on a vehicle with 150k miles?

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List of thing I've done so far:
- Driven with empty rear compartments
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