as too blowing up they are behind 8.3's.. not these smaller CATs. As too first.. does this T-Case T1138-11s have a low range that would drop all the gears lower (numerically higher)? On the 3700sp first is realistically more equivalent to 1st gear when a T-case is in low range. Only available in the FMTV's if in 4wd mode. 2cnd gear in 3700sp is more equivalent to first gear in a tranny with a Typical t case in 4wd high range or 2wd.
You may want to check out www.planbsupply.com, too. They don't reset the miles like Acela does, but they get very low mileage military vehicles and then upgrade them. We're getting an 1997 LMTV with 17k miles on it from them and they are also outfitting the cabin. They also do 6x6.
So, I hate to say it but I backed out at the last minute with my Acela/XP Camper build. As I was looking through these pages of trucks for sale, I came across a Mercedes 1017 with a GVX camper box, flew out to Colorado and bought the rig. All in all comparison, I think the 1017 is one of the best chassis you can travel with. I have it at a shop in Colorado where I'm doing some upgrades to my specs, then off to cruise the world in November 2019!