So I put my new TRD rear sway bar on a couple weekends ago. The bar is designed for a Gen4, but "fit" on my Gen3 so long as I used the Gen3 brackets. I had no problems with it that day, but the next day I took it to an autocross. Now there is a rattle in the rear when I hit bumps. I removed the rear deck so that I could see the top of the strut, and when I hit a bump the top of the strut piston rod will actually move up and down. The nut is tightened as far as I can get it, but it somehow still moves when I hit bumps. I took it to the shop today, and they told me that it IS the RSB that is hitting the body when I hit bumps... my question is, why would the top of the strut move so much then? And if the RSB is the problem, why hasn't anyone else had the problem? I want to believe you guys when you said that the Gen4 RSB would fit the Gen3, so.... could it be the upper strut mount allowing it to move? Could it be the strut itself, which I know for a fact is blown, and it's just allowing the suspension to travel too much? Help guys, I really don't want to go back to the stock bar!