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Home >> Buick >> 2011 >> Lucerne CX >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 9 (Automatic Transmission - 4T80-E - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> Second Gear Starts

Second Gear Starts

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Second Gear Starts

Checks Causes
1-2 Shift Solenoid Valve
  • Stuck OFF
  • Pinched wire to ground
Pressure Control Solenoid
  • Inoperative
  • Leakage
  • Pinched wire to ground
Starts at HI Line only, Driven Sprocket Support Staked checkball missing
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