2001 audi a4 i.8 quattro car goes out of gear when driving
 

car shifts normally then all of a sudden it just stops accelerating. Engine does not rev, clutch does not slip, will not go into gear unless clutch pedal engaged. Rocking car in reverse ie. popping the clutch, it drove fine for 3 shifts then stopped. Transmission pulled clutch pressure plate and flywheel look fine, hydraulics look fine. on bench trans only engages rear drive. neither front inner axle engages no matter what gear you select. is this normal?