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Home >> GMC >> 2017 >> Acadia SL >> Repair and Diagnosis >> External Pages >> Different car >> Section 197 (Automatic Transmission - 8L45 (M5N M5T) Or 8L90 (M5U) - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P2808 or P2809: Torque Converter Clutch (TCC) System Stuck >> Circuit/System Description

Circuit/System Description

WARNING: This page is about a different car, the 2017 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.

The transmission control solenoid valve 7 is a high pressure, normally low, variable force solenoid. This solenoid is also referred to as, the torque converter clutch (TCC) control solenoid valve assembly. The transmission control solenoid valve 7 regulates and directs pressurized oil to the TCC regulator valve, which regulates and directs pressurized oil on to the TCC control valve and finally to the torque converter to apply the clutch. The transmission control module (TCM) uses information from the transmission speed sensors along with serial data information from other control modules to calculate torque converter slip speed.

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