Unless your truck is subjected to some rough service, I think you've got some time left.
I just replaced both of the unitized hubs on my truck at about 128,000 miles simply as a preventive measure. I wanted to do it at a time and place of my choosing rather then have one fail unexpectedly out in the middle of nowhere. I figured that many miles was enough because I've read about bearing failures starting about then.
Regards,
John L.