my right front axle seal is starting to leak,im an auto mechanic so i check for up/down movement in the output of the diff and the axle is floppy, thinking the bearings are bad. After research,im not so sure they are.do the axles have a lot of slop in them, like the front wheel hubs do? i replaced the front wheel bearings because of excessive bearing slop only to realize the hub doesn't tighten up the bearings like on a car. Almost like the axle shaft is worn allowing slop when axle nut is tightened.im thinking same for the diff,just arctic cat slop.am i wrong? Should there be up\down slack in axle at the output?