transamz9 wrote:
I don't care how you look at it , it takes torque to keep the RPM's up. A gas motor can't make the torque at highway speeds to keep the RPM's up when put under a load without going out of it's optimum RPM range.
Exactly right. If you let the gas engine run where it makes its power it will pull just fine. People seem to insist on letting it shift back into "mileage mode" when hauling a load and then complain when "it keeps shifting down and back up." The diesels' good mileage RPM is really close to its power generating RPM because it simply doesn't have as much of a range of RPM. More fuel is added when power is needed and less when not. The gas engine rev's to make power.
Overdrive is great for a low rev'ing diesel or unloaded gas engine. It doesn't work so well when trying to keep a gas engine making its best power.
