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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 Garage Shift

Harsh Garage Shift

WARNING: This page is about a different variant/trim than selected.
Checks Causes
Input Carrier Assembly (570) Inspect for worn or stripped Output Internal Gear Splines.
Low/Reverse and 1-2-3-4 Clutch Housing (551)
  • Inspect for damaged or fatigued 1-2-3-4 Clutch Wave Plate (557) and Low and Reverse Clutch Wave Plate (547). Refer to Clutch Plate Diagnosis .
  • Inspect for stripped or sheared splines on 1-2-3-4 Clutch Plate (546). Refer to Clutch Plate Diagnosis .
  • Inspect for improperly positioned or plugged Low Reverse Piston (550) air bleed.
  • Inspect for correct fluid level.
Low and Reverse Clutch Assembly (OWC) (543) Inspect for stripped or sheared internal and external splines on Low and Reverse Clutch Assembly (543).
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