Fits General Motors 5L40E 1999-2006 Cadillac and BMW Includes Actuator Feed Limit Valve Repair and Pressure Regulator Valve repair kit. Contains tools and parts for the repair of (3) units. Fixes wrong gear starts, slip in 4th, 5th, and 6th. Improves and restores correct drivability with added durability. A Refill kit without tools, "includes enough parts for an additional (5) units" is available; TransGo Part# 5L4-ACT-VL5 Installation recommendation: Experienced technician Transmission removal necessary: Actuator Valve repair does not require transmission removal. Pressure regulator valve replacement requires transmission removal.