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 DEGREES F) OR TOO LOW (BELOW 150 DEGREES F)
WORN OR FAULTY CLUTCHES
INTERMITTENT CLUTCH SEAL LEAKAGE (POSSIBLE HEAT SET FAILURE)