Operation CHARM
: Car repair manuals for everyone.
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Chevy Truck
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1993
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Suburban 3/4 Ton 2WD V8-454 7.4L
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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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Harsh Shifts
Harsh Shifts
1. Line pressure to high or low.
2.
Force motor
malfunctioning.
3. Loose PCM connector.
4. Accumulator piston or spring incorrect or missing.
5. PROM calibration incorrect.