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Home >> Buick >> 2011 >> Lucerne CX >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission - 4T65-E - Diagnostic Information And Procedures >> Diagnostic Information and Procedures >> First and Second Gear Only - 2-3 Solenoid Stuck On

First and Second Gear Only - 2-3 Solenoid Stuck On

First and Second Gear Only - 2-3 Solenoid Stuck On

Checks Cause
DEFINITION: The transmission only provides first and second gear in Drive range. The shift pattern as the vehicle accelerates from a stop is 1-2-2-1. First gear ratio is 2.921:1 and second gear ratio is 1.568:1.
Control Valve Body Assembly
  • A faulty 2-3 shift solenoid valve assembly (315B) is stuck On.
  • Debris is found in the control valve body (301) or the control valve body spacer plate and gasket assembly (396)
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