I have a 2011 Focus SEL with a 2.0L and an automatic trans. I had to replace the left axle shaft assembly a couple of months ago due to a torn boot for the inner CV joint. I replaced the seal at the trans axle, and now it's leaking. I see some side play in the shaft. I suspect that the bushing in the housing is worn. How much side play is acceptable, and is that bushing replaceable? I see that it is replaceable on some of the other axles, but I can't find a parts listing on this one.