GM Service Manual Online
For 1990-2009 cars only

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