Torque Converter Clutch (TCC) Applies

WARNING: This page is about a different car, the 2020 Buick Regal and 2019 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.

Torque Converter Clutch (TCC) Solenoid

The TCC solenoid is commanded ON, allowing LINE fluid to enter the TCC VFS fluid circuit. TCC VFS fluid is directed to the TCC VFS accumulator and thru orifice #57 to the TCC regulator apply valve and to the TCC control valve.

TCC Regulator Apply Valve

TCC VFS fluid, at the TCC regulator apply valve, opposes TCC regulator apply valve spring force and orificed regulated apply fluid pressure to regulate DRIVE 2 fluid into the REGULATED APPLY fluid circuit. REGULATED APPLY fluid is routed to the TCC control valve and through orifice #56 to the spring end of the TCC regulator apply valve.

TCC Control Valve

TCC VFS fluid moves the TCC control valve against TCC control valve spring force, allowing REGULATED APPLY fluid to pass through the valve into the TCC APPLY fluid circuit and apply the torque converter clutch. TCC release fluid passes through the TCC control valve and is exhausted.