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Home >> GMC >> 2020 >> Terrain Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1 (Automatic Transmission - 6T40 (MNH) - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> Harsh or Late Second and Sixth Shift

Harsh or Late Second and Sixth Shift

WARNING: This page is about a different car, the 2020 Chevrolet Equinox. However, it is still accessible from the selected car via links, so may be relevant.
Checks Causes
2 - 6 Clutch Assembly
  • Inspect for worn or improper surface finish on the 2 - 6 Clutch Plates (540 - 542)
  • Inspect for fatigued 2 - 6 Clutch Piston Apply Plate (540)
  • Inspect for plugged, restricted or incorrect orientation of the 2 - 6 Clutch Piston (535) air bleed
Case Assembly (50)
  • Inspect for damaged or broken 2 - 6 Clutch Piston (535) and piston seals damaged, worn or delaminating
  • Inspect for fatigued 2 - 6 Clutch Piston Return Spring (536)