Considering I saw an Xterra on the trail this weekend turning skinny 36" Swampers (yes, 36) with a stock driveline on some pretty nasty conditions, I think we're in decent shape already.
I also saw a 3.0L Hardbody turning skinny 38" Swampers very effectively with the stock driveline as well.
Pictures to follow in the next day or so,
Brent