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AZTechBrian, ASE Certified Technician
Category: Pontiac
Satisfied Customers: 708
Experience:  Owner
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Pontiac G6: I have a 2009 Pontiac G6 Sedan that clunks on bumpy

Customer Question

I have a 2009 Pontiac G6 Sedan that clunks on bumpy roads. It's definitely coming from the rear. I have replaced the rear shocks and this past weekend I replaced the Front Struts and Front Sway Bar Links.There's no sign of the exhaust system being loose or contacting anything. I've jacked up the LH rear wheel and used a large bar to look for worn Sub Frames. I can't find anything loose. Any ideas?
Submitted: 1 year ago.
Category: Pontiac
Expert:  AZTechBrian replied 1 year ago.
Hello. Have you replaced the front and rear sway bar bushings? Those are usually the reason a car clunks when going over bumps. Other possibilities would include end links, ball joints and other bushings but most commonly it's the sway bar bushings. were those replaced already?
Customer: replied 1 year ago.
I replaced the Front Stuts and the sway bar links. I haven't replaced anything in the rear yet, besides the new rear shocks. When I tried moving the rear sway bar bushings with a pry bar, everything appears to be tight.
Customer: replied 1 year ago.
Sorry, I replaced the Front Strut assemblies and sway bar links.
Expert:  AZTechBrian replied 1 year ago.
Ok. I would change the sway bar bushings. Those are most likely the problem.
Customer: replied 1 year ago.
Even though they all seem tight? I'll give a try. It won't be unti the weekend though. I will tell you that it's a very, very annoying clunk every time the suspension is working. Especially on rough roads,,,
Expert:  AZTechBrian replied 1 year ago.
they may seem tight when attempting to move the sway bar by hand, but the force of the bar on those bushings on the road is much stronger than we can put on by hand. Often times the bushings do seem tight by when attempting to move the bar by hand but end up being the issue after all. if you raise your wheels off the ground and try to wobble your wheels and they are all tight, all your sway bar end links are tight, then I would definitely replace the bushings.