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Home >> Buick >> 2015 >> Regal GS, AWD >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission - 6T70 - Diagnostic Information And Procedures >> Diagnostic Information and Procedures >> Harsh or Late First, Second, Third, and Fourth Shift

Harsh or Late First, Second, Third, and Fourth Shift

Checks Causes
1-2-3-4 Clutch Assembly
  • Inspect for damaged or broken 1-2-3-4 clutch piston (461) and piston seals damaged, worn or leaking.
  • Inspect for fatigued or binding 1-2-3-4 clutch piston return spring (460).
  • Inspect for improper surface finish on 1-2-3-4 clutch plates (456-458).
  • Inspect for broken or fatigued 1-2-3-4 clutch waved plate (458).
Case Inspect for leaking or damaged 1-2-3-4 clutch fluid passage seal (65).
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