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Shift Control Solenoid

A shift control solenoid is a computer-controlled hydraulic valve that is used to command a gear change in an automatic transmission.

Symptoms of Wear or Failure

  • Illumination of the Check Engine Light
  • Automatic transmission does not shift correctly

Related Repair Advice

  • Improper diagnoses of wiring and sensors can lead to unnecessary replacement of shift solenoids
  • Failure to service the transmission at the recommend intervals can lead to sticking shift solenoids and erratic shifting
  • When replacing a shift solenoid, its related wiring should always be thoroughly inspected
  • Some transmissions allow for replacement of individual solenoids while others require replacement of all shift solenoids as an assembly
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