demiles wrote:
Okay I was trolling, sorry! I know the numbers game the mfg's have to play. You say 3500lbs in the back? Yep did that a couple weekends ago, put 2 yds of top soil in the bed. Yes it dropped probably 3 inches but was no where near the bump stop.. I was praying the tailgate was going to hold up though because it was close to full.
Just as you believe the F250 is more truck than the ratings show many believe the same thing about the XD. There are many towing 5th wheels and toy haulers taking them over the GVWR and claim it does so with ease. I won't make that claim since I'm within the ratings with my trailer. The XD rear differential is the same one used in the NV3500 van rated at 5900lbs, only difference is the 6 vs 8 lug flanges on the axle . . .
Assuming you really did have 3,500 lbs. in the bed, I'd estimate you exceeded your Nissan Cummin's RAWR by 1,600 lbs. If you had done this with a 3/4-ton Ram diesel you would have been right at its 6,500 lb. RAWR.
The XD may have the same differential as the NV3500, but it does not have the same axles. A larger differential may mean a higher tow capacity. However, those smaller, 6-bolt, semi-floating axles on the Nissan Cummins have a much, much larger say in your truck's payload capacity.
Given a choice of driving with 3,500 lbs. in the bed with
6-bolt, semi-floating axles that are
overloaded by 1,600 lbs. vs. driving with 3,500 lbs. in the bed with
8-bolt, full-floating axles designed and rated to handle 3,500 lbs. . . . for me . . . the choice is a no-brainer.