[svxfiles]

Getting an object to move is harder than keeping it moving (newtons laws of motion). A car is a heavy object, about 3800# with gas and a driver. to start it from a dead stop takes a lot of horsepower, just try pushing it by yourself. but after you get it started rolling, it becomes easier, and you can almost run with it on a level smooth surface. It takes more energy at start up, so it creates more heat at start up. Keeping it at 60 mph takes less power than getting it there so wear and heat are not as much of a problem or concern while cruising. I agree that tire height is not as important at speed, but that is not where the wear is as much of a factor. ps the tranny cooler is allways a good idea as long as the trans gets up to opperating temp.