Flywheel Locking Tool for 6.6L Duramax High-quality Material: Our 22100 Flywheel Locking Tool is constructed from heavy-duty CRV steel, ensuring durability and resistance to rust and corrosion. Application: Specifically designed for 6.6L Duramax engines with Allison automatic transmissions, our flywheel locking tool effectively locks the flywheel on the transmission to prevent any rotation. Perfect Fit for Duramax 2500 & 3500 Vehicles: With toothed pieces that effortlessly remove the metal spring-loaded inspection plate on the transmission, our flywheel locking tool seamlessly slides into the opening towards the engine.The top of the tool securely engages with the teeth of the flywheel, providing a perfect fit and locking it in place. Ideal for Duramax 4500 & 5500 Trucks: Our flywheel locking tool is specifically designed to work seamlessly with Duramax 4500 and 5500 trucks. It features toothed pieces with screws that remove the rubber inspection cap on the bottom of the transmission. Simply insert the tool at the front of the opening, engage the flywheel, and hand tighten the bolt for a secure hold. Convenient 36mm 12-Point Socket Included: To ensure hassle-free installation and removal of the harmonic balancer bolt, our flywheel locking tool comes equipped with a convenient 36mm 12-point socket. With a 3/4" square drive, this socket provides proper torque and a reliable connection.