I can tell you from experience that a truck at 35 mph is way less efficient.You might find off road trucks that work good at 35 mph,but thats about it.Maybe an old 5 speed Mack,but I doubt it.You have to get a run at hills,especially if you dont have any horsepower.High horsepower trucks do better where you arent lugging or downshifting.Every little rise you come to at 35 you would be shifting.Trucks or nothing else does very good if you have to keep your foot to the floor all the time.You want enough power to climb hills with reserve.There are lots of lies about stuff like the 35 mph is better for trucks,obviously they have never driven a truck. The quicker you can get to operating speed,and the longer you can keep it there without stopping and starting the better economy you have.A 13 speed transmission,in big hills will get better fuel mileage than a 10 speed because you can split gears and get ahead of a truck that has to drop full gears.Over a day that adds up to say 10 miles further down the road,maybe more.Gears,horsepower,drafting,and other things are way more involved than a certain speed.Every vehicle out there is not made to run 35,55,or 100 mph.
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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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