Viscous Limited Slip Differential Explained

A viscous limited slip differential (VLSD) is a type of differential that uses a viscous coupling to transfer torque to the wheel with more grip. This is an alternative to a clutch pack differential, but it is not as effective at locking the two driveshafts.

How Does a Viscous Limited Slip Differential Work?

A VLSD uses a viscous coupling, which is a device that uses a fluid to transfer torque. The fluid is contained in a sealed chamber, and it is heated by friction when the driveshafts rotate at different speeds. As the fluid heats up, it becomes more viscous, and it transfers more torque to the wheel with more grip.

When the vehicle is turning, the inner wheel will rotate slower than the outer wheel. This difference in speed will cause the fluid in the viscous coupling to heat up. The hotter the fluid, the more viscous it becomes, and the more torque is transferred to the outer wheel.

Advantages of a Viscous Limited Slip Differential

VLSDs have a number of advantages over open differentials. They:

• Improve traction in slippery conditions
• Provide better handling in corners
• Reduce tire wear

Disadvantages of a Viscous Limited Slip Differential

VLSDs also have some disadvantages. They:

• Are not as effective at locking the two driveshafts as clutch pack differentials
• Can be more expensive than open differentials
• Can be prone to overheating in extreme conditions

Applications of Viscous Limited Slip Differentials

VLSDs are typically used in vehicles that are driven in a variety of conditions, such as:

• Sports cars
• SUVs
• Trucks

Conclusion

A viscous limited slip differential is a type of differential that uses a viscous coupling to transfer torque to the wheel with more grip. It is an alternative to a clutch pack differential, but it is not as effective at locking the two driveshafts. VLSDs have a number of advantages over open differentials, but they also have some disadvantages.