This tool consists of a 10-pound weight, a steel plate for supporting a dial indicator, and a magnetic base. The base attaches to the transmission, allowing the dial indicator to measure the travel of the clutch assembly under a 10 lb. load. Used to check the travel of both the 1-2-3-4, 3-5-R, and 4-5-6 clutch assemblies in 6L50, 6L80, and 6L90 transmissions.