Viscous coupling unit
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A viscous coupling is a sealed mechanical device that transfers torque and rotation between two shafts by means of a viscous fluid. One use is in automobiles as a differential, especially in four-whee
An example of a viscous coupling unit opened up
The fluid inside the VC
Completely disassembled
The internal plates
Limited-slip differential
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A limited-slip differential is a type of differential gear train that for on-road use still allows its two output shafts to rotate at different speeds, but limits the maximum difference between the tw
Viscous coupling unit
…surfaces. A viscous coupling unit between the front and rear drive shafts provides for minor speed differences between the plates and functions like a limited-slip differential when there is a greater speed difference between the front and rear drive shafts. The device consists of circular plates with tabs or perforations…
Cone-type LSD
ZF LSD – clutch stack visible on left
ZF LSD – spider pinion shaft ramps visible
Audi Quattro Torsen Differential