I, like David, have a feeling that the bar itself snapped. that's all i've ever seen on the rear ones. I have replaced broken torsion leaves, like on a beetle. Never dealt with any of the front ones like this. The splines are usually fine, in fact, more than fine. they usually rust up real nice and become one with whatever they are seated in. I've seen every scary method under the sun used to free them up, sometimes to no avail.