Standard gearing for the rear end is 4.10 with the option of going to 3.73. I don't plan on pulling any large trailer, so would I get better mileage out of the 3.73?
Ans: Unless your will be towing 10,000 trailer, absolutely get the 3.73 gears. I've had both, 4.10 & 3.73 gears on Powerstrokes. The cab noise is much less with the3.73's, fuel mileage will be better, so will engine life.
Part A. There is also an option for a limited slip rear axle, is this a good idea?
Ans: Bad idea if you ever drive on ice. Limited slip will put your butt in a ditch. Sounds counterintuitive, but it is a fact.
Part B. I am thinking about having a detroit locker installed on the rear end for added off-road capability. Which unit would you recommend? Mechanical or air powered? If I go this way should I still get the limited slip option, or would that just be replaced by the locker parts?
Ans: If you think your need a Detroit locker for off-road capability, you are buying the wrong truck. Buy a 4X4. With that big diesel in the front and no weight in the bed, you ain't going to have any off-road capability, locker or not. You will be getting stuck on wet grass. Also, Detroit doesn't make an air locker.
I would also get the camper package and make sure I get for and aft sway bars. Are the stock sway bars good enough? Or do I need to go to IPD for better units?
Ans: Stock sway bars are better than no sway bars. After market sway bars can be stiffer, but many times the mounting method and hardware sucks.
I would also stay with the stock "18 chromed steel wheels as I assume these would be the strongest?
Ans: Get the factory aluminum wheels. They are stronger than you will ever need, lighter than steel and won't rust.
Any other advice or comments would be much appreciated!
Ans: Get the factory electric trailer brake controller, even if you think you won't need it. You may and you will get your money back on resale anyway.
Ans: Don't buy the factory receiver hitch. Buy a Reese Titan hitch instead. It's strong and will handle an extension much better.
Ans: SRW truck, plan on buying 4 Rancho 9000 shocks. Try it with out them, but on a SRW truck hauling a TC, they should be mandatory.
Ans: SRW truck, plan on buying air bags. There are all types of overload springs out there. NONE OF THEM are as good as are bags if you only haul your camper part of the time.
Ans: Don't forget the camper package and the sliding RV mirrors.
Lots to think about.........Good Luck,
'96 Lance 500, '01 F-350 Powerstroke SC 4X4 SRW, Rancho 9000's, Air Lift Air Springs, Titan Hitch w/24" extension, Happijac Tie-downs, Line-X Bed Liner, 18' Bumble Bee / 150 ProV Yamaha, 16' Aluminum / 35 Honda