Anyone know what this strange vibration could be.I have a 97 ss camaro installed new clutch flywheel slve cylinder.After completing install and starting car I have a weird ****** of transmission then a roaring vibration that stops in about 30 seconds from start up.It is worse usually after all night being parked.Car drives fine after all this during start up any ideas.Please help I have spent alot of doe to have this going on...