When I look at the vehicles that the new part number applies to the 9412426 is used on vehicles that were rated for 50-60% of the GVW from what what my truck is.

My truck grosses at 11,000. A most of the trucks that this 'new' part number crosses to are in the 6-7000 GVW range.

EMPTY my truck is more than these trucks GROSS.

That's one thing that is confusing me... is it a valid concern? I would be running these bearings at 2x the current design use. Yes, I will load it up to 10k+ (it has a dump body and I plan on using it).