Sonnax 4T60E Transmission Oversized TCC Apply Valve Kit 84754-98K The TCC apply valve acts as the switch valve for converter apply and release. The TCC regulator valve (84754-01K and 84754-08K) controls TCC apply pressure. Both the apply valve and theregulator valve can cause slip codes. When the apply valve is worn, it often returns to the unapply position even though the TCC apply solenoid remains energized. Generally the apply valvecauses larger changes in slip RPM as the converter cycles from apply to full release. The regulatorvalve causes a more gradual load and heat-sensitive slip. Check for changes in slip RPM with ascanner o rchanges in cooler flow with the Sonnaflow® FM-01KA. PTFE seal prevents loss of signal oil that strokes the valve Oversized versions available to restore thevalve body bore Standard-size versions are drop-in replacements and do not require valve body removal Tool kit services both early and late models Contents Valve PTFE Seal Spring