I push the rears into the doors with the 4" lift....I am willing to bet its the lift design though. I would love to try 35's! Also remember that not all 285/70/17's are created equal. They are all close, but lug style and sidewall can effect if the tire rubs or not.
Come to think of it the AEV Iceland Commander runs 39's with the 4" Superlift but they did have to modify the rear doors to get the required clearance. Man that would be something - 39's! I am willing to bet that if I can get the newly modified rear arms I could fit 35's with little issue so in that light 285's might just work on a ~2" lift.