12 Bolt axle play

[SFTorange]

Hi All,

I was installing the rear wheel on my truck today, when I heard a clunk come from the differential when I pulled in and out on the wheel. I pulled the tire and brake drum off, and there is between 1/8 and 1/16 of an inch of play in the axle. When it bottoms out on either side, it makes the audible clunk. There is no gear oil in the differential, which would probably quiet down the noise, but I'm not sure what is normal. The driver's side has no play that I can tell. The axle is a junkyard piece, so I've never driven with it. Should there be any slop or play in the axles? It kind of makes sense given the c-clip setup, but the play seems odd.

Thanks!