Excessive Shift Shock From "N" To "D" Position
WARNING: This page is about a different car, the 2002 Nissan Sentra, 2002 Infiniti G20, 2001 Nissan Sentra, and 2001 Infiniti G20. However, it is still accessible from the selected car via links, so may be relevant.
Possible cause: engine idle RPM or TP sensor misadjusted, incorrect line pressure, incorrect transmission fluid temperature signal or engine speed signal, or damaged line pressure solenoid valve, valve body assembly, N-D accumulator or forward clutch.