Erratic Shifting

Symptom:
* ERRATIC SHIFTING

POSSIBLE CAUSES
ENGINE PERFORMANCE 1) STICKY TPS 2) STUCK IAC MOTOR 3) INTERMITTENT FUEL PRESSURE 4) ENGINE COOLANT STAYS LOW TOO LONG- THERMOSTAT STUCK OPEN
(TRANS OPERATING IN OVERHEAT STRATEGY)- DEFECTIVE COOLANT SENSOR AND/OR CONNECTOR (CHECK PCM DTC'S) 5) COOLING FANS INOPERATIVE
TRANSMISSION OVERHEATING 1) NORMAL OPERATION IN CITY TRAFFIC, STOP AND GO TRAFFIC 2) ENGINE COOLANT TEMP TOO HIGH (ABOVE 230°F) OR TOO LOW (BE LOW 150°F)
WORN OR FAULTY CLUTCHES
INTERMITTENT CLUTCH SEAL LEAKAGE (POSSIBLE HEAT SET FAILURE)