Yeah I have the 2014 NV 3500 SL but I can't see the 1000 (or anything for that matter) stamped on the hitch, just that sticker that says look at the manual. I'm not sure if you have a 2013 one (since you talk about downshifting in the pm whereas I would just put on the tow mode) and it used to be stamped on there and now it's not? I also didn't see it listed on the towing package for 1000 - do you have a link (not that I don't believe you but would like to show it to a Nissan guy when I call them so they can't just brush me off - I tried calling them yesterday but just tossed around between sales and the mechanics haha).
And no, they don't have a different listing for non-WD and WD in the manual, something I thought was interesting as well since all the other third-party hitches I could put on the van have that distinction.
I really think Nissan just might be being super conservative and/or taking the easy route by just setting the tongue weight to 10% of the max tow power which should force you into never going past the max towing capacity for multiple reasons *shrugs*.
