B&M ShiftPlus Electronic Shift Improvers electronically recalibrate your transmission's hydraulic system. The ShiftPlus improves shift firmness to reduce slippage and associated heat to extend the life of your transmission. A simple flip of the switch allows the transmission to operate in the performance mode. Flip it back and you are back to stock mode. Anyone can install a B&M ShiftPlus in minutes with a few simple hand tools. This design allows you to improve the transmission's shifting performance without removing the transmission pan or valve body.