One problem related to vehicle shudder has been reported for the 2000 Infiniti Q45. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2000 Infiniti Q45 based on all problems reported for the 2000 Q45.
Transmission would shift hard while shifting from first to second gear, and vehicle would vibrate uncontrollably. Driver took the vehicle to the dealer for inspection, and mechanic could not duplicate the problem. Also, vehicle was operating as designed.