Lock-Up Torque Converter Trouble Shooting - CHRYSLER

TORQUE CONVERTER - NO LOCK-UP (CHRYSLER)

Possible Cause	Correction
Faulty oil pump	Check and replace oil pump
Sticking governor valve	Clean and replace governor valve
Valve body malfunction	Check valve body operation and perform HYDRAULIC PRESSURE TESTS
Stuck switch valve	Clean and replace switch valve
Stuck lock-up valve	Clean and replace lock-up valve
Stuck fail-safe valve	Clean and replace fail-safe valve
Faulty torque converter Possible failed locking clutch Possible leaking turbine hub seal	Replace torque converter Replace hub seal
Faulty input shaft or seal ring	Check and replace input shaft or seal ring

TORQUE CONVERTER - WILL NOT UNLOCK (CHRYSLER)

Possible Cause	Correction
Sticking governor valve	Clean and replace governor valve
Valve body malfunction	Check valve body operation and perform HYDRAULIC PRESSURE TESTS
Stuck switch valve	Clean and replace switch valve
Stuck lock-up valve	Clean and replace lock-up valve
Stuck fail-safe valve	Clean and replace fail-safe valve

CONVERTER - STAYS LOCKED UP AT TOO LOW A SPEED IN DIRECT (CHRYSLER)

Possible Cause	Correction
Sticking governor valve	Clean and replace governor valve
Valve body malfunction	Check valve body operation and perform HYDRAULIC PRESSURE TESTS
Stuck switch valve	Clean and replace switch valve
Stuck lock-up valve	Clean and replace lock-up valve
Stuck fail-safe valve	Clean and replace fail-safe valve

TORQUE CONVERTER - LOCKS-UP OR DRAGS IN LOW OR SECOND (CHRYSLER)

Possible Cause	Correction
Faulty oil pump	Check and replace oil pump
Valve body malfunction	Check valve body operation and perform HYDRAULIC PRESSURE TESTS
Stuck switch valve	Clean and replace switch valve
Stuck fail-safe valve	Clean and replace fail-safe valve

TORQUE CONVERTER - STALLS OR IS SLUGGISH IN REVERSE (CHRYSLER)

Possible Cause	Correction
Faulty oil pump	Check and replace oil pump
Plugged cooler, lines, or fittings	Check cooler, lines, and fittings for obstruction
Valve body malfunction	Check valve body operation and perform HYDRAULIC PRESSURE TESTS
Stuck switch valve	Clean and replace switch valve
Faulty input shaft or seal ring	Check and replace input shaft or seal ring

CONVERTER - LOUD CHATTER DURING LOCK UP ENGAGEMENT (COLD) (CHRYSLER)

Possible Cause	Correction
Faulty torque converter	Replace torque converter
Possible failed locking clutch	Replace torque converter
Possible leaking turbine hub seal	Replace hub seal

CONVERTER - VIBRATION OR SHUDDER DURING LOCK-UP ENGAGEMENT (CHRYSLER)

Possible Cause	Correction
Faulty oil pump	Check and replace oil pump
Valve body malfunction	Check valve body operation and perform HYDRAULIC PRESSURE TESTS
Faulty torque converter	Replace torque converter
Engine performance	Diagnose and perform engine tune-up

TORQUE CONVERTER - VIBRATIONS AFTER LOCK-UP ENGAGEMENT (CHRYSLER)

Possible Cause	Correction
Faulty torque converter	Replace torque converter
Misaligned exhaust system	Check and align exhaust system
Engine performance	Diagnose and perform engine tune-up
Throttle linkage misadjusted	Check and adjust throttle linkage, see LUBRICATION & ADJUSTMENTS

TORQUE CONVERTER - SHUDDER AFTER LOCK-UP ENGAGEMENT (CHRYSLER)

Possible Cause	Correction
Faulty oil pump	Check and replace oil pump
Plugged cooler, lines, or fittings	Check cooler, lines, and fittings for obstructions
Valve body malfunction	Check valve body operation and perform HYDRAULIC PRESSURE TESTS
Faulty torque converter Possible failed locking clutch	Replace torque converter
Engine performance	Diagnose and perform engine tune-up
Misaligned exhaust system	Check and align exhaust system
Throttle linkage misadjusted	Check and adjust throttle linkage, see LUBRICATION & ADJUSTMENTS

TORQUE CONVERTER - VIBRATION WHEN REVVED IN NEUTRAL (CHRYSLER)

Possible Cause	Correction
Faulty torque converter or converter out of balance	Replace torque converter

CONVERTER - OVERHEATS: BLOWS OIL OUT DIPSTICK/PUMP SEAL (CHRYSLER)

Possible Cause	Correction
Plugged cooler, lines, or fittings	Check cooler, lines, and fittings for obstruction
Stuck switch valve	Clean and replace switch valve