The person on the route before me had a 700, it was high enough to make the grade without running aground but the truck's transmission wouldn't make it up the driveway. This is according to the previous driver, since then I upgraded to an 800 because I wanted the extra room and had no intention of driving on driveways like those, so much can go wrong under different circumstances. As a matter of fact on the second house I know for a fact a Fed Ex truck went over the side of the driveway and it took two tow trucks to get it out. Its hard to see but where the driveway curls off on the right its a straight drop down, according to the homeowner, his left side went over and only a tree saved him from flipping. Apparently his truck was having issues going up and he gunned it, misjudged I suppose.