Disclosed herein are systems, gearing assemblies and methods for controlling a differential rotation rate between shafts of a vehicle using a variable speed reversible motor. An embodiment includes a gearing assembly including a differential configured to engage a first axle shaft, a second axle shaft, and a drive shaft of a vehicle. The gearing assembly further includes a first plurality of alignment gears and a second plurality of adjustment gears configured to engage the differential, configured to be driven by a variable speed reversible motor of the vehicle, and configured to controllably alter a rotation rate of a first axle shaft relative to a rotation rate of the second axle shaft based on rotation produced by the variable speed reversible motor.