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Hummer
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2007
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H3 Automatic
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Repair and Diagnosis
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Transmission
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Hydraulic Diagrams
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Automatic Transmission - 4L60-E/4L65-E/4L70-E - Removal & Installation, Overhaul, Troubleshooting & Diagnosis
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Symptoms - Automatic Transmission
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Ratcheting Noise
Ratcheting Noise
Ratcheting Noise
Checks
Causes
Parking Brake Pawl (50-81)
The parking pawl return spring is weak, damaged or misassembled