The Axial RTR has a front differintial with optional locker included and a slipper clutch in the center that can be used as a slipper or tightened for crawling. It also comes with 2 pinion gears for the motor. One for crawling(very slow) but one for bashing that allows it to go well over 20 miles per hour. Check out the Axial website, I think you'll be very impressed by the versatility of this truck. It's great for jumping and bashing with one pinion gear, or you can put in the other one to slow it down along with the included locker for the front and use it for a crawler. There's a utube video of it, several in fact, but one in particular that really shows its versatility and durability. In case you havn't guessed, I really like this truch and am debating whether to buy it or a Traxxass Slash to race. That's another one to consider. The Slash is only 200 RTR, has waterproof electronics, is possibly the most durable rc truck on the market, and there are special race classes for this truck at just about any track. There is an endless supply of hop-ups for it as well. The Slash race classes, however, are mostly spec classes meaning you have to run it stock. This evens the racing field so that the guy with the most money has no advantage. It's great for bashing or racing. Again, good luck with your search and check out the Axial website for the RTR, I think you'll be impressed. Just have fun with whatever you buy.