Operation CHARM
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GMC Truck
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1988
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S15/T15 4WD Jimmy V6-173 2.8L
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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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Symptom Related Diagnostic Procedures
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3L30 (180/180C) Automatic Transmission
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Harsh 1-2 Shift
Harsh 1-2 Shift
1. High fluid pressure.
2. 1-2 accumulator valve stuck.
3. Second clutch spring cushion broken.
4. Second gear ball valve missing.