I don't repack bearing any longer. If a bearing lacks sufficient grease they often wear excessively and the play that develops often damages the integrity of the seal. Bearings are cheap, usually less than the labor charged for a repack. Bearings are easy to replace yourself.
As previously mentioned, check the axle
for wear as it may not be worth rebuilding. The cost of a new axle
is miniscule compared to the cost of a vehicle recovery should failure occur during travel. That's a lesson I learned the hard way! Check out your options and decide which one is most likely to work for you.