I have a 1996 Cobra. I bought it with a lot of suspension mods. Lower control arms, koni shocks, eibach springs, sub frame connectors, and large tires (315 17 35)sitting on boyd wheels. It handles great, however every time I go over a bump, or a dip in the road I get this crazy squeak. Sometimes it soft and barely noticeable and then other times it loud! Does this model car have known or common issues with squeaking rear ends? Any Ideas what the cause could be???