Transgo SK 6T40-A Shift Kit Fits all 6T30, 6T40, 6T45 GEN1 2007-2012 (Upgraded)*

Manufacturer Part Number: SK 6T40-AOther Part Number: T144165A, T46165ABrand: Transgo*Upgraded* Shift Kit® Fits all 6T30, 6T40, 6T45 GEN1 2007-2012 with pressure switches This 6T40-A Shift Kit fits 2007 to 2012 GM vehicles equipped with GEN1 6T30, 6T40 and 6T45 automatic transmission. These transmissions often come in with complaints of soft or flare up on shifts, burned friction plates, TCC slip as well as various solenoids and gear ratio codes. This kit does not fit GEN2 units. These complaints are often the result of wear at the actuator feed limit (AFL) valve. The purpose of the AFL valve is to limit the pressure going to the solenoids. The AFL valve spring is calibrated to prevent the solenoid feed pressure from exceeding a predetermined PSI, no matter what main line pressure is. This is necessary to prevent more fluid from being fed to the solenoids than they can effectively regulate and limit what max line pressure output is. If the pressure feeding the solenoids