B&M 70380 - ShiftPlus Shift Improver - GM 4L60E/4L80E

Overview: The new design of the B&M® ShiftPlus™ Electronic Shift Improver allows you to improve the transmission's shifting performance without removing the transmission pan or valve body. A simple flip of the switch allows the transmission to operate in the performance mode. Flip it back and you are back to stock!Installs in just minutes, the ShiftPlus simply recalibrates your transmission's hydraulic system electronically for optimum performance and extended life! Select the mode that best suits your application. Reduces slippage and heat! 50 state emissions legal. The ShiftPlus shift firmness not only makes driving more fun and pleasurable, but slippage and heat are reduced, extending the life of your transmission!   Features: Recalibrates Transmission Hydraulic System No Need to Remove Transmission Pan Reduces Slippage and Heat Installs In Minutes Firmer Shifts   Application: Year Make Model Submodel Engine Size