They sure are. At the end if last winter, my left rear wheel and axle passed me by on a busy road in Milwaukee.. I locked it in 4x4 and drive the block and a half to get it. Drove it to a parking lot another 2 blocks up. Snowing heavily by the way. I got a tow home, but had it together a day later and driving fine. Until the ball joint decided it had enough. Let's just say that at about 236,0000 miles, change all the bearings and ball joints, tie rods and whatever else you find down there. So far I can say I drove it til 3 out of the 4 tires fell off(or close to off)! Glad I didn't sell it when I bought the Avalanche, the Tracker just feels good to drive!