I just bought my 07 mustang gt a week ago it had been lowered by the previous owner. I'm not sure how much it was lowered but in the front you cant see maybe a half inch of the top of the tire and the rear is low enough to not see any gap. The problem is when im on the highway the rear end feels bouncy. Not out of control bouncy. But it feels like it needs new shocks. When somebody is laying down in the passenger seat i can actually see their head bobbing around from the bouncing. Also when im backing down my driveway i hear the rear suspension made a loud squeak or if i hit a big bump it will squeak. Sometimes the car even bottoms out.

I took the car to belle tire today and they looked it over and told me that this is typical for a vehicle that is lowered. I dont mind a rough ride from lowering its just continuous bouncing and bottoming out doesnt seem right. Is there anything i can do about this.

If it makes any difference its an 07 gt with about 50,000 miles and 18 inch bullits.

 

Sounds like you need stiffer shocks. I also had the suspension "squeak" sound. The dealer told me it was "rocks in the exhaust pipe." I'm not making this up. After the dealer skillfully removed the offending "rocks", the squeak persisted, believe it or not. I crawled underneath the rear of the car and applied spray lubricant to every suspension mounting point I could see (and places I couldn't see, I'm sure) and, voila! - squeak is gone and hasn't come back, now six months later.

 

Thanks for the advice. I asked the shop if i could get stiffer rear shocks since they have less room to travel and seem to be traveling too far as it is... and he said that you cant do that to a car... lol. thats the last time i go there. now i think i need the rest of the stuff they checked rechecked.

 

I'll bet that the car still has its original rear shocks, or at best maybe mass-market replacements that were valved more for easy-driving comfort than actual suspension control.

Either way, at least the rebound damping is not up to completely controlling the stiffer lowering spring. The bouncing is coming from the car rising up more as the stiffer springs toss it further upward, not from the rear of the car moving more in the downward direction.

If they are the OE shocks, you aren't even getting much help in the 'bump' direction to help keep you off the bump stops. Not after 50,000 miles.

See if you can find out whose springs are in there. Then on Monday give Sam Strano a call to find out if either Konis or D-specs would work OK with however much lowering you have (he's competing out of town this weekend).


Norm

 

The previous owner put lowering springs on the OEM shocks.
The springs wear out the OEM shocks faster and yours my sir are worn.
Replacing them with stock shocks and they will be shot sooner than expected again.

And forget about the fronts. Bump steer very much?
Wear tires much like a dump truck from out of spec camber?

 

how bad is the bounce? does it bounce on a normal surface or on a more extreme imperfection/ large dip