Your rear axle is the only thing that isn’t easily upgraded (like tires and springs) that will be close to it’s actual “rating.” Corporate 9.25 rear axle is a 3900-4000lb rated axle. Nothing special. However they are basically Bulletproof even at that weight. But there’s a reason they’ve used the same axle in the back of half tons for almost 50? Years now.
But since you’ll be using a good wdh even that won’t be an issue.
I’d still have good LT tires on the back and something to stiffen the springs. The little red airbags that go inside the springs are a cheap easy adjustable option.
