I've had a 94 Cobra for about three months. Never had a problem with it so I park it in the garage last night and when I go to work today every time I hit a good sized bump it sounds like the rear axle is trying to come through the back seat. I jack the car up when I get home and I can't see anything wrong. The car has an Eibach Pro Kit that was installed by the previous owner. Any ideas? Shocks?