What type of auxiliary braking system uses transmission fluid in its operation?

The auxiliary braking system that utilizes transmission fluid for its operation is the hydraulic transmission retarder. This braking system works by using the vehicle's transmission fluid to create resistance, which helps to slow down the vehicle. As the transmission fluid circulates within the retarder, it generates friction that converts kinetic energy into heat, thereby providing additional braking capacity without engaging the traditional brake components directly.

This type of retarder is particularly valuable in large vehicles, such as buses and trucks, where managing speed and reducing wear on the service brakes can enhance overall performance and safety. The hydraulic mechanism allows for smoother braking action and helps maintain vehicle control during descent and other challenging driving situations.

Other types of auxiliary braking systems, such as the Jake Brake or engine brake, operate on different principles, mainly using the engine’s existing systems to provide a braking effect. The electric retarder, meanwhile, relies on the vehicle's electrical system and magnetic forces to create resistance. Each of these systems has its own advantages and applications but does not involve the use of transmission fluid like the hydraulic transmission retarder does.