Ok, quick bio... 2005 GT,5 speed Manual trans, stock except for JLT CAI and Diablo Tune.
Ok is it normal to hear a loud single "thump" coming from the engine bay the moment in press the clutch in when shifting from 1st to 2nd gear at WOT.
Ex: in 1st gear, WOT, 6000 RPM - Presses clutch...