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A locking differential is a mechanical component, commonly used in vehicles, designed to overcome the chief limitation of a standard open differential by essentially "locking" both wheels on an axle together as if on a common shaft. This forces both wheels to turn in unison, regardless of the traction (or lack thereof) available to either wheel ...
A differential is a gear train with three drive shafts that has the property that the rotational speed of one shaft is the average of the speeds of the others. A common use of differentials is in motor vehicles , to allow the wheels at each end of a drive axle to rotate at different speeds while cornering.
Four High and Four Low modes were also featured on both Explorer and Expedition. Four High mode tells the intelligent locking multi-disc differential to lock, providing a permanently locked 50:50 torque distribution. [4] The front and rear drive shafts are fully locked, forcing them to rotate at the same speed regardless of tractive conditions.
The result is a differential that does not bind up like some LSD types and locking ones, but still gives increased power delivery under many road conditions. Examples include: Torsen T-1 is the brand name of the original Gleasman differential invented by Vernon Gleasman circa 1949 (US Patent 2,559,916 applied in 1949, granted 1951). [12]
Locking hubs disengage the axle at the wheels, allowing all of the axle to be at rest during normal driving. Nevertheless, a CAD system still makes for much less drag than having the axle completely locked in (which would spin the axles, differential, driveshaft and part of the internals of the transfer case).
When the front hubs are locked, even if no power is sent to the front axle (by means of a transfer case), the turning of the wheels will still spin the front axle, differential, and driveshaft, which puts extra load on the engine. Unlocking the hubs disconnects the wheels from the axle, which eliminates this extra load.
The 9.5-inch C-clip rear differential was featured in both the Suburban and pickups, available in 6- or 8-lug variations, employing 33-spline axles. This differential remained in production through 2009 and even found use in vehicles like the TrailBlazer SS, Saab 9-7X, and SSR.
When cornering, the inner and outer wheels rotate at different speeds, because the inner wheels describe a smaller turning radius. The electronic differential uses the steering wheel command signal and the motor speed signals to control the power to each wheel so that all wheels are supplied with the torque they need.