Two technicians are discussing the viscous coupling used in all-wheel drive systems. Technician A says a viscous fluid such as a silicon-based oil is added to the assembly and fills the areas between the clutch plates. Technician B says the viscous coupling is active during equal traction conditions. Which technician is correct?

Question

Quizplus · Accepted Answer

Technician A is correct because a viscous coupling in all-wheel drive systems indeed uses a viscous fluid, such as silicon-based oil, to fill the spaces between the clutch plates, allowing for the transfer of torque between the plates. Technician B is incorrect because the viscous coupling is primarily designed to transfer torque to the wheels with the most traction during unequal traction conditions, not during equal traction conditions.

Two Technicians Are Discussing the Viscous Coupling Used in All-Wheel