Yeah, we are on the same page.
And is exactly my point, when I say that Toyota has typically run more conservative with their ratings.
What you are referring to is the margin of safety.
And is also 100% why I refuse to run anything but a 3/4 or 1-ton, with a full float rear axle.
The actual Sterling/Visteon rating for the rear axle itself in my superduty, which is under essentially every 3/4 and 1-ton SRW trucks, has an actual rating of nearly 10,000lbs
Though Fords GAWR for this truck is roughly 6,500lbs as I recall. Id have to check. But I'm not worried about it one bit. Its pure beef, with e great reputation of being impossible to destroy.
Off the assembly line the limiting factor for full size pickups is typically tires.
A SRW with this axle has a GAWR of 6-7k lbs.
Whereas the same axle in DRW configuration is considerably more.
And surprise, the typical OEM size load E tire has a load rating of 3,000 to 3,500lbs per tire