You'd better recheck those Nebraska tests. Drawbar horsepower (in general) goes UP in the higher gears, not down. That's because drawbar hp is affected by wheel slippage, and you get the most slippage in the lower gears. For example, check out the test for the JD 7130. (Which I picked at random.)
The worst drawbar horsepower was in the lowest gear tested.
Drawbar horsepower is difficult at best to measure, since there are so many external variables, particularly soil condition. But drawbar horsepower has no bearing on gear ratios for highway vehicles. Presumably your wheel slippage is minimal when you're going down the road at 70 mph. If not, then you need to let off the gas a bit.
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Today's Featured Article - Women and Tractors - by Teri Burkholder. The View from the Garage - Never a doubt, everything on our farm is a learning experience. I've been working very hard to get our two rundown Farmall A's sanded, primed , bondo�d, fiberglassed and painted before our big local tractor show called the Tulip Festival. My husband Ben came in the garage one rainy day to see if he could "help". Well if you knew Ben you wouldn't want him anywhere near your spray gun, fiberglass or bondo! So I pulled out the 2 old yucky looking magne
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