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Home >> Buick >> 2015 >> Regal GS, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 11 (Automatic Transmission - 6T40 - DTC P0973 To DTC P2764 And Troubleshooting Procedures) >> Diagnostic Information and Procedures >> Harsh or Late Second and Sixth Shift

Harsh or Late Second and Sixth Shift

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Checks Causes
2-6 Clutch Assembly
  • Inspect for worn or improper surface finish on the 2-6 Clutch Plates (540542)
  • 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)