I had play in my RH rear wheel bearing and replaced it just 6,000km ago. At earlier the time I thought it odd because the bearing was not that old, 20,000km. I only use Timken so they should last longer. The last time I replaced it I also replaced the retaining plate with a genuine Mopar one in case that was the problem.
Now the play is back. It is axial play. This time, rather than replacing the bearing/seal I took a close look under a magnifying glass. There is nothing wrong with it. I measured the axial float and got 1.2mm (!!!)
What I did this time is added five x 0.25mm shims in the axle housing behind the stationary race:
https://www.ebay.com.au/itm/22432641...r=523415118129
It seems to be okay for now. I have read this is a reasonably common issue, so posting this to help others.