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Home >> Chevrolet >> 2007 >> Avalanche 5.3 3 >> Repair and Diagnosis >> External Pages >> Different car >> Section 899 (Automatic Transmission - 6L50/6L80/6L90 - Service, Diagnosis & Troubleshooting) >> Noise in Fourth, Fifth, or Sixth Gear

Noise in Fourth, Fifth, or Sixth Gear

WARNING: This page is about a different car, the 2007 GMC Yukon XL, 2007 GMC Yukon, 2007 Cadillac Escalade EXT, 2007 Cadillac Escalade ESV, and 2007 Cadillac Escalade. 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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