Here is an out of the box idea. If it only happens when it dives (ie. on the brakes) could it be pads installed incorrectly allowing movement or a motor mount?
Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
This site may earn a commission from merchant affiliate
links, including eBay, Amazon, Skimlinks, and others.
After it makes some pops it won’t repeat itself. I can goose the throttle, dog the brakes, whip it right and left and nothing! Seems like it happens when the vehicle sits or something. Jack it up and shake everything down and no play in anything. It would be nice to have some knock sensors mounted to each suspension piece that you can datalog each knock or sound. Seems insane in this day and age mechanic shops can’t perform that service to diagnose
Exactly this.
This is what makes me think it's a bushing or something binding up and getting stiff and then it breaks loose and settles down again once you get some movement. It ONLY happens after I've parked overnight or a few days and pull out of my parking spot.
Hi Dan : did you ever solve the problem?Some background:
2005 Lexus GX470 with 112k miles on it. Very well maintained by previous owner. I've had it for the last 6k miles or so.
When i bought the truck i noticed that there was a pretty loud clunk when i was turning right to get into my driveway. I did some research and lots of people suggested that i need to replace the sway bar end links.
I bought some high quality non-OEM end links (used the same brand in the past on other cars with great success) and i replaced them WITHOUT replacing the sway bar bushings. Since i also replaced the CV boots when i bought the truck and i had to touch it, I also re-tightened the lower ball joint large nut - just in case.
All of this FIXED the clunk. The truck was quiet for about 3-4k miles.
Now, i have a new suspension clunk from the driver side. It happens only when i pull out of my driveway and/or when i start turning the steering wheel. It clunks once and then for miles, regardless of how i drive...the truck is quiet. Another time when i can hear it is when i step on the brakes hard and the truck leans forward. As the front end dives in, this is when i hear the clunk. Turning the steering to the right or left while moving does not bring the noise most of the time.
So, the new clunk is similar to what we had before but it is not the same, or at least it is triggered by different conditions (braking, moving the car after it's been staying parked for awhile, etc)
There are no other symptoms. No vibrations, no pulling to the side, no other strange noises. Everything under the truck looks tight and clean. Front shocks were replaced at 67k miles with OEM parts.
Where should i start looking? Any bushings that may be going bad at this mileage/age? Any common weak areas to inspect? Could it be the sway bar bushings, since i did not replace them?
Thanks!
What Grease you Using? Red Axle Grease (Mobil 1 or Red & Tacky)?Clunks I've had were 1) driveshaft slip yolks (greasing took care of the front, but the rear ended up getting replaced - it had a flat-out metallic clunk that sounded like a transfer case problem), 2) steering rack bolts that backed off some time after I replaced the rack, and 3) brake pads rattling due to lacking the anti-rattle clips. Ball joints of sway bar end links would need to be pretty bad on a GX to clunk, but you should be able to jack up the rig and check those easily for wear with a pry bar.
9 times out of 10 it's your driveshaft slip yolks that are clunking. A new rear driveshaft is about $300 from a Lexus or Toyota dealer and has an updated design. You should also be greasing both the front and rear slip yolks and U-joints (6 total grease points) at every oil change, with just 3-4 pumps of grease. Over-greasing will also cause the slip yolks to clunk as the shaft will bottom out on a big plug of grease when it slips far enough inward.
Lucas Red 'n Tacky. I use it in my GX (driveshafts and ball joints), wheel bearings on both of my trailers, and everywhere on my tractor (loader cylinder bushings, front axle pivot bushings, PTO shafts, and 3 point hitch bushings). It's good stuff.What Grease you Using? Red Axle Grease (Mobil 1 or Red & Tacky)?
I did mine recently and there were way more Zirks than I expected.