When signal pressure is applied to the switch valve in listed Chrysler transmissions, the valve is shuttled to the full stroke position. In this position, the release circuit to the torque converter is vented and the apply circuit is opened to the line pressure. This moves the torque converter from the released or fluid coupling state to the lockup state. The apply pressure on the torque converter is equal to the full line pressure.

When line pressure is excessively high or experiences spikes either due to general wear or in chipped and/or performance-enhanced transmissions, this pressure goes directly to the converter and can potentially deform or balloon the torque converter. This deformation can affect drivability, efficiency and performance. Along with this, bore wear at the TCC switch valve allows critical fluid loss that prevents proper TCC operation.

Reconditioning the bore and installing Sonnax oversized TCC apply limit switch valve kit 44912-41K limits the amount of pressure applied to the torque converter without affecting the line pressure and restores proper TCC operation.

• Improved valve replaces OE TCC switch valve
• Protects the torque converter from ballooning and failure due to excess pressure
• Oversized, carburized steel valve repairs leakage and combats premature wear
• Limits TCC apply pressure to a max of 150 psi, even in chipped and high performance units