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 (BELOW 150° F)

WORN OR FAULTY CLUTCHES

INTERMITTENT CLUTCH SEAL LEAKAGE (POSSIBLE HEAT SET FAILURE)