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Home >> Hummer >> 2007 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 1159 (Automatic Transmission - 6L50/6L80/6L90 - Removal & Installation, Service, Overhaul, Troubleshooting & Diagnosis) >> Diagnostic Information and Procedures >> Harsh, Soft, Delayed or Slipping Second or Sixth Gear

Harsh, Soft, Delayed or Slipping Second or Sixth Gear

WARNING: This page is about a different car, the 2008 GMC Sierra, 2008 GMC Cab & Chassis Sierra, 2008 Chevrolet Silverado, and 2008 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Checks Causes
Center (with 2-6 Low and Reverse Clutch) Support Assembly (67)
  • Inspect for damaged or worn 2-6 clutch plates (452 and 454).
  • Inspect for damaged 2-6 clutch backing plate (451). Inspect for worn splines on backing plate.
  • Inspect for damaged 2-6 clutch backing plate retaining ring (450).
  • Inspect for damaged 2-6 clutch piston assembly (457), spring (456), retaining ring (455), and center support assembly (459).
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