Lisle 22100 Flywheel Lock for 6.6L Duramax

Lets flywheel engages when harmonic balancer is removed on 6.6L Duramax engines equipped with Allison automatic transmissions Saves time by blocking the flywheel on the gearbox; instead of removing the starter to replace the water pump Use a 36mm 12-point connection with 3/4 square drive to remove the harmonic balance screw and tighten when installed Package dimensions are 4.5 inches wide x 5 inches high x 2 inches deep