An actuation assembly includes a first shaft comprising a first end disposed opposite a second end. The actuation assembly further includes a second shaft with a first end disposed opposite a second end. The first end of the second shaft is disposed within the second end of the first shaft such that the first end of the second shaft can move relative the second end of the first shaft. A fluid chamber formed between the first shaft and the second shaft at the second end of the first shaft. Magnetorheologic fluid is disposed inside the fluid chamber and a magnetic field generating coil is disposed around the second end of the first shaft and the first end of the second shaft.