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AUTOMATIC TRANSMISSION
LOCKUP TORQUE CONVERTER DIAGNOSIS CHART
•
POSSIBLE CAUSE
FAULTY OIL PUMP
X
X
X
X
X
STICKING GOVERNOR VALVE
X
X
X
PLUGGED COOLER, LINES OR FITTINGS
X
X
X
VALVE BODY MALFUNCTION
X
X
X
X
X
X
X
STUCK SWITCH VALVE
X
X
X
X
X
X
STUCK LOCKUP VALVE
X
X
X
STUCK FAIL-SAFE VALVE
X
X
x
X
STUCK LOCKUP SOLENOID
X
X
SOLENOID WIRING DISCONNECTED
X
FAILED LOCKUP SOLENOID
X
FAILED LOCKUP RELAY
X
X
FAULTY TORQUE CONVERTER:
X
X
X
X
X
OUT OF BALANCE
X
FAILED LOCKING CLUTCH
X
X
X
LEAKING TURBINE HUB SEAL
X
X
ALIGN EXHAUST SYSTEM
X
X
TUNE ENGINE
X
X
X
FAULTY INPUT SHAFT OR SEAL RING
X
X
THROTTLE LINKAGE MISADJUSTED
X
X
J9021-62
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