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GMC
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1993
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Forward Control 7.4 N
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Repair and Diagnosis (Single Page)
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Transmission
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Automatic Trans
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Automatic Transmission - Overhaul & Testing - 4L80E
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Trouble Shooting
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Symptom Diagnosis
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No Overrun Braking in "D2"
No Overrun Braking in "D2"
Problem with overrun clutch or reaction sun gear assemblies.