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Home >> Cadillac >> 2017 >> Escalade ESV Base, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 17 (Automatic Transmission - 6L80 (MYC) Or 6L90 (MYD) - Description And Operation) >> Description and Operation >> Drive Range, Fifth Gear Default >> 1-2-3-4 Clutch Releases or 2-6 Clutch Releases

1-2-3-4 Clutch Releases or 2-6 Clutch Releases

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C1234 Pressure Control Solenoid 5 

If the transmission was in 4th gear when an electrical condition commands a protection mode, the C1234 pressure control solenoid 5 defaults to the OFF position, allowing PCS 1234 clutch fluid from the 1-2-3-4 clutch, the 1-2-3-4 clutch regulator valve and 1- 2-3-4 clutch boost valve to exhaust.

2-6 CB26 Pressure Control Solenoid 4 

If the transmission was in 6th gear when an electrical condition commands a protection mode, the CB26 pressure control solenoid 4 defaults to the OFF position, allowing PCS 26 clutch fluid from the 2-6 clutch regulator valve, and the 2-6 clutch to exhaust.

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