Operation CHARM
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Dodge or Ram Truck
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1990
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W 150 Ramcharger V8-360 5.9L
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Repair and Diagnosis
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Transmission and Drivetrain
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Automatic Transmission/Transaxle
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Testing and Inspection
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Lockup Torque Converter Diagnosis By Symptom
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A500/A518 4-Speed
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Will Not Unlock
Will Not Unlock
1.
Sticking fail-safe valve.
2.
Sticking lock-up valve.
3.
Sticking switch valve.
4.
Valve body malfunction.
5.
Sticking governor valve.