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 - A Belt Pulley? Really Doing Something? - by Chris Pratt. Belt Pulleys! Most of us conjure up a picture of a massive thresher with a wide belt lazily arching to a tractor 35 feet away throwing a cloud of dust, straw and grain, and while nostalgic, not too practical a method of using our tractors. While this may have been the bread and butter of the belt work in the past (since this is what made the money on many farms), the smaller tasks may have been and still can be its real claim to fame. The thresher would bring in the harvest (and income) once a y
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