Close
Clunking or knocking sounds when driving.

Clunking or knocking sounds when driving.

(2004 Chevrolet Trailblazer EXT)
When driving on the streets there’s a clunking or knocking sound from slightly rough streets (manhole covers ) to very rough streets (patched potholes). It’s very noticeable when slowly driving over speed bumps. I hear it mostly in the right front wheel and when both rear wheels go over the speed bump. I had a free alignment check done. The mechanics couldn’t do the alignment because the Left and Right Outer Tie Rods, the L/R Sway Bar Links, and the L/R Sway Bar Bushings were worn. These parts were replaced and the alignment was done with success. However, the clunking or knocking sounds were still present. The mechanics thought that the strut assembly and rear shocks were the problem and replaced them. The sounds are still present. They check the exhaust and heat shields with negative results. After the alignment was done the steering is solid, no drifting to left or right. My annoyance comes from the clunking/ knocking sounds. Thank you, Ed Ransom.
Tags: chevrolet, trailblazer ext
1 answer & 0 comments
Popular Answer
on August 20, 2019
Hello Ed, it's even harder to suggest what to look for via my computer than it is with the inspections that have been performed! I wish it were not the case, sounds like you've thrown quite a bit of money at this already.

A qualified, skilled technician needs to thoroughly go over the front steering and suspension of the vehicle. There is still something not right here, as you know. You can get noise from steering gear components, suspension components, wheel bearings, ball joints, bushings -- there are many potential sources. It is good that you have replaced parts that have been identified as worn. Hopefully the folks who have done all this work will continue to check for you without taking more money in the meantime! Good luck.
Sign in to reply
General Diagnosis
$88 - $111 Learn More
on August 20, 2019
Hello Ed, it's even harder to suggest what to look for via my computer than it is with the inspections that have been performed! I wish it were not the case, sounds like you've thrown quite a bit of money at this already.

A qualified, skilled technician needs to thoroughly go over the front steering and suspension of the vehicle. There is still something not right here, as you know. You can get noise from steering gear components, suspension components, wheel bearings, ball joints, bushings -- there are many potential sources. It is good that you have replaced parts that have been identified as worn. Hopefully the folks who have done all this work will continue to check for you without taking more money in the meantime! Good luck.
Sign in to reply

Similar Questions

View answers to similar questions from RepairPal's community of auto experts and enthusiasts.
I paid $2045.56 to auto doc for many repair issues. one example is they charged me for the valve cover gasket repair...
I just got a 91 ford explorer. and it was slipping so i checked the fluid and it was a low so i toped it off. and now...