I dunno what the chung chung sound was, the lubricant was a quick fix but it came back. I just took the coilover out, pulled it all apart to bits, put it back toghether and it is fine now. Its not just d2s, i have been reading heaps of forums and other jap brands ets have the same gremlin type issues. I think it comes down to set-up and the corolla has messy type front end with the sway links attached to the shockers so u gotta adjust these alot to get em right. Plus the D2 have alot of possible adjustements but with crap generic installation instruction. I prob post a step by step install soon so the rest of u guys can set it up right from word go. Neways the Street D2 handle absolutely awsome with a very good ride quality, I can pretty much floor it out of corners now with minimal wheels spin and there are not too many cars that can keep with me through corners, especially considering i dont have an lsd. Real bang for your buck performance.