Harsh Garage Shift

Checks	Causes
NOTE: On cold days, approximately 32°F (0°C) or colder, the transmission is designed to shift differently. The transmission uses a warm-up mode shift schedule until the engine reaches normal operating temperature. While the transmission is in warm-up mode, it is normal for transmission upshifts to be delayed or held longer. This feature improves heater performance by giving quicker vehicle warm-ups.
Engine	Elevated engine RPM - Verify correct engine operating rpm per application.
Control Solenoid (w/Body and Valve) Valve Assembly (12)	Incorrect or inadequate adapt activity - Perform Q77 Transmission Control Solenoid Valve Characterization Programming procedure. Incorrect TCM temperature reporting - Monitor TCM temperature using appropriate scan tool. Line pressure control solenoid incorrect pressure.