The TransGo drop-in redesign USA-made hardened steel TCC regulator valve features longer lands which restores the hydraulic integrity of the circuit by utilizing previously unused and therefore unworn areas of their bore. In addition, the special designed valve and spring calibration enables the computer to control the TCC regulation more accurately, which results in better slip control. Lastly, the drop-in USA-made hardened steel clutch select valves greatly help prevent the valves from sticking in their bores.