I just had a new Southbend Daily clutch with lightweight (stage II) flywheel installed in my 2007 A4 Avant with 89,000 mi and the car is almost undriveable. Upon startup in first gear, especially on any sort of hill there is a lot of shuddering as I let out the clutch which is very disconcerting. As well, upon hard acceleration as the engine reaches about 3000 rpm I am hearing an air leak which sounds like turbo loss and the engine is breaking down (like a misfire). Anyone have an idea what's going on? I'm bummed!