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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 Third, Fifth, and Reverse Shift

Harsh or Late Third, Fifth, and Reverse 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
3 - 5 Reverse Clutch Assembly
  • Inspect for damaged splines or improper surface finish on 3 - 5 Reverse Clutch Plates (507 - 509), Backing Plate (510)
  • Inspect for damaged, worn or leaking 3 - 5 Reverse Clutch Piston Seals (504 - 506)
  • Inspect for warped 3 - 5 Rev/4 - 5 - 6 Clutch Housing (516)
  • Inspect for broken or fatigued 3 - 5 Reverse Clutch Waved Plate (507)