Not sure about the front bearings, but I learned some interesting things about the rear bearings this week. The rear bearings were only made by two or three manufacturers. Regardless of the package or company, they come from the same factory. They were made years ago, and often come with the 89-91 collar that retains the rear bearing. Finding the correct collar to hold the bearing requires going through Isuzu. In theory, the collar is reusable, but sometimes breaks on removal(20K press and a torch) or even during install when you press em in. This is why its taking me two weeks to change rear wheel bearings in the RS, which of course are the same in all the trooper/VX since 1991. Lessons learned.....