Trying to diagnose a vibration that only happens when you accelerate, goes away when you lift off the gas. Pretty sure it's one of the axles, but none of boots are torn or anything else to indicate which one is bad. On the driver's side, the axle has about 1/8" of play if you were to grab it and push it/pull it towards and away from the transmission, so linear play, not lateral.
Are these axles supposed to have any play? If so how much is acceptable?