( Automotive engineering : Vehicle components , Engine, transmission, and exhaust )
The lubricated grooves allow the hubs to shift if shafts are misaligned or subject
to end float.
The right amount of end float is important so that your axle does not overload the opposite hub bearing by feeding
axle loads from one side of the car to the opposite bearing.
Crankshaft end float is controlled by the center main bearing.
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