No First, Third, Fifth, Sixth, Seventh, Eighth, or Ninth Gear

Automatic Transmission - 10L80 MHS MQC | Diagnostic Information and Procedures | Document ID: 4578452

Checks	Causes
1-3-5-6-7-8-9 Clutch Assembly	Inspect for damaged or worn 1-3-5-6-7-8-9 clutch plates (556–557). Inspect for damaged 1-3-5-6-7-8-9 clutch piston (561), return spring (559), piston dam (563), and apply plate (573). Inspect for damaged 1-3-5-6-7-8-9 clutch piston dam retaining ring (565). Inspect for cut, worn or damaged 1-3-5-6-7-8-9 clutch piston seal (560), and dam seals (562, 564). Inspect for damaged or improper 1-3-5-6-7-8-9 clutch backing plate (555). Inspect for worn splines on backing plate.

Checks

Causes

1-3-5-6-7-8-9 Clutch Assembly

Inspect for damaged or worn 1-3-5-6-7-8-9 clutch plates (556–557). Inspect for damaged 1-3-5-6-7-8-9 clutch piston (561), return spring (559), piston dam (563), and apply plate (573). Inspect for damaged 1-3-5-6-7-8-9 clutch piston dam retaining ring (565). Inspect for cut, worn or damaged 1-3-5-6-7-8-9 clutch piston seal (560), and dam seals (562, 564). Inspect for damaged or improper 1-3-5-6-7-8-9 clutch backing plate (555). Inspect for worn splines on backing plate.