Just a few weeks ago I started to notice the rear of the car feeling like it was kinda shaking back and forth. At first I thought it was the road but since it feels like it does it more. Only mods I have that could be related are lowering springs and a panhard bar. It does it usually 35-60 and at no specific times. Any ideas.

 

My '07 Coupe is doing the same thing-- My car has 152,000 mi. on it and just started doing it a few months ago when I'm driving on the freeway.

I jacked it up and checked tightness of rear LCA and the rear GT sway bar I put on 5 yrs. ago--everything seemed tight.

My car is stock except for:

Roush rear 1" lowering coils
adj. panhard rod
GT takeoff rear sway bar
catch can

The only thing I didn't check was the small upper control
arm that mounts on top of Diff.

Please post if you find the source of your sway.


thanks,
chris

 

Worked on one a few years back broken pan hard bar. Connects from bod to axle. Look up under the rear tires and check your suspension... The one I worked on was so bad, barely pushing above wheel well moved the car six to eight inches back and forth. Real dangerous to drive w busted suspension parts. Could be rotted bushing too. Check thoroughly, and inspect bushings and bolts too

 

Also check the simple thing, tire air pressure mine was just feeling the same way and I checked the pressures and both back tires were low on pressure, aired them up and now she feels good!!

 

could be a bad bushing in your LCA