I've never had those issues out there. However, there all possibilities and if you suffer any of them, you wont make the top 5. That being said, your missing the point. most guys that don't or cannot build their rig, wouldn't begin to know how to fix it. How many guys on this forum that own ER, SM, AC etc could change an axle shaft, Ujoint, serpentine belt etc etc? How many actually even carry a spare driveshaft, axle shaft, hub etc and then how many actually carry the right tools? Don't kid kid yourself, there arn't that many. How many can even tell you the gear sets in their rigs and how many MOG guys actually have ever pulled off a cast portal box because it cracked on the trail? Ask me how I know? How many carry an on board welder and can actually weld a broken tie rod? My point is, not many and most are extremely un prepared. If 75% of these guys broke down off road, my guess is that they are walking. It's no different than the Jeep guy who took his wallet to a shop and had it built and has no idea how to recover it. I'm not saying that I have all the answers. However, I have talked to a lot of the company's reps that I mentioned and have talked to a lot of the owners of them. And neither can tell you that much info about their rig. Sure, they can tell you fuel capacity, BTU heat, vehicle ratings etc. However, ask them what size ring gear is in the axle and its RCA dog stare. Trust me, we had originally set out to find the perfect vehicle for our family and was planning on buying a turn key rig. However, we quickly realized the limitations and lack of experience by both the builders and the owners. I welcome any of them to take their "EXPO" rig to Johnson Valley, Ca, Rubicon etc and I have had no takers along the way. My rant continued as I pressed the builders for simple explanations of Link material, spring rates, body roll, COG, etc etc and quickly found out, they dont really know. So why would someone go that far into the elements with that much confidence into one of these trucks, unless you really were never planning on putting it thru that much punishment?