A 700R4 is about the poorest choice you could make. It is simply too weak for the weight and profile of the vehicle. A 4L80E would be a better choice, but you will be getting into some money there. Even if you get a core transmission from a salvage yard, have it reconditioned, and get the controller to operate it, you will spend a lot of money. Not hundreds, but thousands. Anything with more gears will get even more expensive - like an Allison. And, the end result may not be satisfactory. Spend a ton of money, get about the same fuel economy, and be totally disappointed in the bargain. Keep in mind that a vehicle with a large frontal area like an RV will benefit more from driving slower than it ever will with changing the transmission. Also note that a 5.7 liter engine is a bit marginal for an 8000 pound vehicle. It might turn out to be afraid of hills.
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Today's Featured Article - Tractor Hydraulics - The Basics - by Curtis Von Fange. Hydraulics was one of the greatest inventions for helping man compound the work he can do. It’s amazing how a little floor jack can lift tons and tons of weight with just the flick of a handle. What’s even more amazing is that all the principals of hydraulic theory can be wrapped up in such a small package. This same package applies to any hydraulic system from the largest bulldozer to the oldest and smallest tractor. This short series will take a look at the basic layout of a simple hydraul
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