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Home >> Chevrolet >> 2021 >> Trailblazer RS, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 11 (Automatic Transmission - VT40 (MRG) - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> Final Drive Noise or Hum Noise

Final Drive Noise or Hum Noise

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Checks Action
Front Differential Carrier Assembly (23) Inspect for damage or the gears are out of position. Replace the front differential carrier assembly (23). Front Differential Carrier Removal
Pinion gear and/or transfer gear teeth on the front differential drive pinion gear assembly (8) Inspect for broken or damaged teeth. Replace the front differential drive pinion gear assembly (8). Front Differential Drive Pinion Gear with Transfer Gear Removal
Reverse Sun Gear (308) Inspect for worn or broken teeth. Replace the sun gear (308). Forward Clutch Assembly Disassemble
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