I'm going to try as hard as I can to describe this accurately. I had an 03 Cobra for about 6 years before selling it to my dad and moving onto something else a few years back. Three years later I'm buying it back and am super excited to get back into it!! Anyhow, at the time I lowered the car on Eibach Springs (like 1.5" and 1" or something like that) and put 18x9 and 18x10 wheels on the car. The rear tires were 295/35/18. All pretty normal mods. In fact my brother has the identical same mods on his 03 Termi. In 6 years of owning the car, at year 5 at some point I noticed during WOT at 70+ mph the car started this incredibly scary rear end side to side motion that forced you to let off the gas by 85-90 because I was scared I was going to kill myself - almost like a dog wagging his tail quickly. Under easy acceleration I never felt a thing. I took it to a suspension shop but they wouldn't drive the car the way it needed to be driven to create the problem, nor would they ride along with me for me to show them.. lol. So all I could do was describe it as good as I could and that got me no where. Eventually I moved on to a C6Z and just said screw it. Dad knew about it and didn't care because it sat in the garage for the three years that I had the Z. But now that I'm getting back into it, it is something I want to figure out. I'm re-sealing the diff here in the next week or two, and am putting different tires on the car, so I will see what its like once I get it out again. Just wanted to see if anyone has ever experienced anything like this with theirs or if anybody has any suggestions before I get it rolling again. Thanks in advance guys!
