Harsh Engagement From Neutral to Reverse

Symptom:
HARSH ENGAGEMENT FROM NEUTRAL TO REVERSE

POSSIBLE CAUSES
ENGINE MOUNTS
EXHAUST SYSTEM NOISE
TPS STICKING OPEN
TCM SOFTWARE NOT UP TO DATE - CHECK FOR LATEST TSB
ENGINE IDLE SPEED TOO HIGH
INCORRECT PRNDL CODE IN REVERSE
HIGH DRIVELINE BACKLASH- HIGH SPLINE CLEARANCE ON DRIVESHAFT(S)- FAILED DIFFERENTIAL PINION PIN