Newb here, I have been looking at replacing my wheel hub assembly on my 99 F250 7.3 for a while now and have have come to the conclusion that the previous owner put on dynatrac hubs. I was wondering how I maintain the dynatrac hubs. Is it as simple as repacking the bearings or is it more involved than that. When I jack the tire up i notice play at 3 and 9. The ball joints are fairly new, so at this point I am thinking that they are still good. Thanks for the help.