No First, Second, Eighth, Ninth, Tenth, or Reverse Shift Gear

Automatic Transmission - 10L80 MHS MQC | Diagnostic Information and Procedures | Document ID: 4578446 No First, Second, Eighth, Ninth, Tenth, or Reverse Shift Gear

Checks	Causes
1-2-8-9-10-Reverse Clutch Assembly	Inspect for damaged or worn 1-2-8-9-10-Reverse clutch plates (417, 418). Inspect for damaged 1-2-8-9-10-Reverse clutch piston (414), return spring (416), and apply plate (415). Inspect for damaged 1-2-8-9-10-Reverse clutch backing plate retaining ring–selective (420). Inspect for damaged 1-2-8-9-10-Reverse clutch backing plate (419). Inspect for worn splines on backing plate. Check the one way clutch for not holding (421).

Checks

Causes

1-2-8-9-10-Reverse Clutch Assembly

Inspect for damaged or worn 1-2-8-9-10-Reverse clutch plates (417, 418). Inspect for damaged 1-2-8-9-10-Reverse clutch piston (414), return spring (416), and apply plate (415). Inspect for damaged 1-2-8-9-10-Reverse clutch backing plate retaining ring–selective (420). Inspect for damaged 1-2-8-9-10-Reverse clutch backing plate (419). Inspect for worn splines on backing plate. Check the one way clutch for not holding (421).