Front CVAs (13849,) for one. I used Gen7 Pro axles on a 4WS rig, and broke 3 universals (like, literally snapped the long part of the shaft) in the span of a few months. Also, if it has aluminum diff housings, you should be fine (maybe,) but if they're plastic, you'll blow them out quickly. I can't tell from the pics in the manual, but part #18131 looks plastic, and you will destroy them in short order. The Gen7 also has all plastic transmission gears (18129) and they're every bit as bad as the diff housings-- the plastic is too flexy. The pin spun it's way through the 20T gear on the first pack I drove. So you'll need to replace pretty much all of the gears, have a back stock of universals, and be ready for a decent amount of torque twist. It basically needs ~80 bucks dropped into it right out of the box. AFAIC, the low pricetag of the Gen7 is absolutely a false economy.