The Fuller- Transmission Isolator Assembly is designed to provide superior protection and performance for your Transmission. This assembly features an oil sump protrusion on the bottom of the Transmission main case, aluminum range and bearing covers, and an O-ring seal for the shift tower to shift bar housing interface. This assembly is designed to reduce noise and vibration, providing a secure and reliable connection between the transmission and the engine. FleetPride is your First Click in Heavy Duty®.