Operation CHARM
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Dodge or Ram Truck
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1990
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W 150 Pickup 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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Overdrive Unit Diagnosis By Symptom
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No 4-3 Downshift W/Overdrive Switch Off
No 4-3 Downshift W/Overdrive Switch Off
1.
Faulty overdrive off switch.
2.
Faulty engine controller.
3.
Faulty lock-up solenoid not venting.
4.
Faulty wiring.