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Home >> Chevrolet >> 2015 >> Cruze LT, Automatic Trans >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission - 6T30 (MH9) Or 6T40 (MH8) - Diagnostic Information And Procedures >> Diagnostic Information and Procedures >> Harsh Fourth, Fifth and Sixth Shift

Harsh Fourth, Fifth and Sixth Shift

Checks Causes
4-5-6 Clutch Assembly
  • Inspect for leaking or damaged 4-5-6 Clutch Piston (520) and Piston Seals (518, 519, 521)
  • Inspect for plugged or restricted 4-5-6 Piston Dam air bleed
  • Inspect for leaking or damaged 4-5-6 Clutch Dam (523)
  • Inspect for plugged or restricted Dam oil feed hole in the 4-5-6 Piston (520)
  • Inspect for fatiqued 4-5-6 Clutch Piston Spring (522)
  • Inspect for leaking 4-5-6 Clutch Dam Seals (523)
  • Inspect for improper surface finish on 4-5-6 Clutch Plates (525-528)
  • Inspect for fatigued 4-5-6 Clutch Waved Plate (525)
  • Inspect for porous, improper surface finish, seal groove damage or plugged or restricted oil passages of the 3-5 Rev/4-5-6 Housing (516)