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Home >> Chevrolet >> 2006 >> Uplander Base >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transaxle - 4T65-E - Service, Diagnosis & Troubleshooting >> Diagnostic Information & Procedures >> First and Fourth Gear Only (1-2 Solenoid Stuck On)

First and Fourth Gear Only (1-2 Solenoid Stuck On)

First and Fourth Gear Only (1-2 Solenoid Stuck On)

Checks Cause
DEFINITION: The transmission only provides first and fourth gear in Drive range. The shift pattern as the vehicle accelerates from a stop is 1-1-4-4. First gear ratio is 2.921:1 and fourth gear ratio is 0.705:1.
Control Valve Body Assembly
  • A faulty 1-2, 3-4 shift solenoid valve assembly (315A) 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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