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Home >> Pontiac >> 2008 >> Grand Prix Base >> Repair and Diagnosis >> Transmission >> Hydraulic Diagrams >> Automatic Transaxle - 4T65-E - Removal & Installation, Service, Overhaul, Troubleshooting & Diagnosis >> Diagnostic Information and Procedures >> Final Drive Noise or Hum Noise

Final Drive Noise or Hum Noise

Final Drive Noise or Hum Noise

Checks Cause
DEFINITION: A final drive noise or hum is most noticeable under light throttle acceleration or turns
  • Final Drive Gear Set (700)
  • Final Drive Internal Gear (693)
  • Worn planet pinions
  • Worn washers
  • Worn or damaged teeth
  • Differential Carrier (700)
  • Differential Side Gears (705)
  • Worn or pitted gears
  • A damaged thrust washer
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