What causes viscous coupler failure?
What causes viscous coupler failure?
A no engagement failure is usually the result of a seal breaking inside the VC, and the consequent leakage of the VC fluid out of the VC and into the area of the front differential where transmission oil is kept.
What does the viscous coupler do?
A viscous coupling is a mechanical device which transfers torque and rotation by the medium of a viscous fluid.
How do you know if a viscous coupler is bad?
A faulty viscous coupling might produce a range of symptoms, such as shuddering in turns, or what sounds like bearing noise, and these are often misinterpreted, even by experienced mechanics.
What is a AWD coupler?
The viscous coupling is often found in all-wheel-drive vehicles. It is commonly used to link the back wheels to the front wheels so that when one set of wheels starts to slip, torque will be transferred to the other set.
What fluid is in a viscous coupler?
silicone
Viscous coupling is filled with silicone and is not computer controlled. A series of plates with holes and slots turn in the silicone fluid. Some plates are attached to the front axle driveshaft and some are attached to the rear axle driveshaft. Normally the plates turn at the same rate without relative motion.
What happens when viscous coupling fails?
What is a viscous coupler Subaru?
A viscous coupling in the simplest terms is a device for transferring torque from a spinning transmission shaft to the front and rear differentials of your Subaru. It serves also to vary the torque between front and rear wheels, depending on driving conditions.
Why do you need a center differential?
The 4Drive four-wheel drive system features a centre differential between the front and rear axles to compensate for the different wheel speeds between the axles from different cornering radii. This prevents torsional stresses in the drive train and automatically distributes the driving forces.