Which failed suspension part causes this?
 

When you hit a bump, your ass end sways a bit. the struts are new. So i ruled them out. Trying to pin point without spending money replacing EVERYTHING, even though i should anyway.

got a lot of junk in your trunk?

lateral link?????

+1

I would check the front diff mount as well.

It almost reads like a front diff like front wheel drive diff mount, thats how I first read it hehe.

You mean your 7 isn't AWD?? :leaving:

Put the car up on jack stands and take a pry bar to all the links and see which ones are deflecting side to side more than they should.

Ill give it whirl once i can get the car into the garage. But the snow is kinda giving me the finger at the moment.

:001_005:

Check the sway bar. S5's have plastic end links and they are prone to breaking under stress.

but i have an S4 so that is ruled out

Check anyways? :lol:. If the swaybar isn't working properly it will result in a loss of traction, which equals the rear end coming out easier.

And the bushings in the s4 endlinks can go bad.

And! they aren't plastic.