Why do trucks have so many transmission gears?
In: 354
Trucks must carry a very heavy load but operate on a diesel engine that has a small operating power rpm range gasoline engines have about a 2000-2500 proper rpm range but large diesels have a 300-500 rpm range.. The only way to get that to while account for uphill and downhill highways is to have a large number of gears. It’s like a 3 banger Geo Metro trying to tow a Suburban with the whole family in it. You would never get out of first because second would not deliver enough tourqe to keep the tires going at that speed without over-revving the engine in 1st. If you add 2 more gears between 1st and 2nd, suddenly you have just enough to keep going.
Latest Answers