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Home >> GMC >> 2011 >> Yukon Base, 5.3 3 >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 13 (Automatic Transmission - 2ML70 - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> No First, Second, Third, or Fourth Gear

No First, Second, Third, or Fourth Gear

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No First, Second, Third, or Fourth Gear

Checks Causes
1-3 and 2-3-4 Clutch Assembly
  • Inspect for damaged or worn 1-3 and 2-3-4 clutch plates.
  • Inspect for damaged 1-3 and 2-3-4 clutch piston, piston housing, spring, and dam assembly.
  • Inspect for damaged 1-3 and 2-3-4 clutch piston dam retaining ring.
  • Inspect for cut, worn, or damaged 1-3 and 2-3-4 clutch piston seal, inner seal, and housing seals.
  • Inspect for improper selective 1-3 and 2-3-4 clutch backing plate retaining ring.
  • Inspect for damaged 1-3 and 2-3-4 clutch backing plate. Inspect for worn splines on the backing plate.
Carrier 3rd Position Assembly Inspect for damaged splines on the hub assembly.
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