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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 First and Reverse Shift

Harsh First and Reverse Shift

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Checks Causes
Low/Reverse and 1-2-3-4 Clutch Housing (551) Inspect for plugged or restricted Low/Reverse/1-2-3-4 Clutch Piston Housing (551) air bleed
Low and Reverse Clutch
  • Inspect for improper surface finish on Low and Reverse Clutch Plates (545547)
  • Inspect for broken or fatigued Low and Reverse Clutch Apply Plate (547)
  • Inspect for damaged or broken Low and Reverse Clutch Piston (550) and piston seals damaged, worn or leaking
  • Inspect for fatigued or binding Low and Reverse Clutch Piston Return Spring (549)