I have about 30-45 degrees of rotational play in the front axle, somewhere. Manually spinning the "pinion flange" that the front DS connects to goes unimpeded and then stops with a hearty clicking noise. Also, when driving I have a nice banging noise and kinetic thump when I let off the gas quickly. Surely this is not normal, but what are the usual suspects? It sounds like anything with a spline or ball is iffy on these things, and the gears themselves are normally ok. Is there an easy way to learn any more without taking everything apart?