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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 362 (Automatic Transmission - 6L80/6L90 - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> Noise in Fourth, Fifth, or Sixth Gear

Noise in Fourth, Fifth, or Sixth Gear

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2011 GMC Yukon XL, 2011 GMC Yukon, 2011 Chevrolet Tahoe, 2011 Chevrolet Suburban, and 2011 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
Noise in Fourth, Fifth, or Sixth Gear

Checks Causes
Input Sun Gear Thrust Washer (55) Inspect for wear or damage.
Turbine Shaft Thrust Bearing Assembly (57) Inspect for wear or damage.
4-5-6 Clutch (with Output Carrier Shaft and Dampener) Hub Assembly (58)
  • Inspect for damaged or worn 4-5-6 clutch backing plate (432).
  • Inspect for improper selective 4-5-6 clutch backing plate retaining ring (431).
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