Why Are There So Many Gears?American Trucks Have 18 Gears！

No AI-generated images. All photos shown in this video are authentic historical photographs. Five positions for the stick, eighteen forward ratios, and two little switches. Here is why heavy trucks needed that range, what the driver had to coordinate, and what automated shifting took over. Did you run a thirteen or an eighteen-speed? Would you go back to shifting one yourself, or keep the automatic? Tell us below. Subscribe for the next story. 00:00 The Little Switch 00:08 The Switch on the Gear Knob 01:50 Eighty Thousand Pounds on a Grade 04:03 The Gap Between Gears 06:06 The Range Box and the Splitter 08:00 The Double Clutch 09:54 Downhill Grades and the Clutch Brake 11:21 Mack's Maxidyne Five-Speed 12:30 AutoShift and UltraShift 14:11 The Price of an Automated Manual 16:18 The Automated Eighteen-Speed Sources: Eaton driver manuals and brochures, Eaton RT-910/RT-915 Service Manual (1972), Eaton Professional Shifting and UltraShift PLUS training films, Cummins Secrets of Better Fuel Economy, Mack company history, NACFE 2014 Confidence Report, Crete Carrier, 2018, FHWA technical summary Public domain: Library of Congress, Prelinger Archives / Internet Archive, Wikimedia Commons. CC0: Spielvogel. Stock video: Pixabay. Editorial reference: Eaton Cummins, Mack Trucks, Crete Carrier, Eaton, North American Council for Freight Efficiency, Eaton Roadranger Driver Instructions TRDR0800, Eaton Fuller Driver Instructions TRDR0630, Eaton Fuller 18-Speed Transmissions TRSL0250, Eaton AutoShift 10- and 18-Speed Transmissions TRSL0281, Eaton video library, Eaton RT-910/RT-915 Service Manual (1972). Graphics: Quitting Time. CC photos were cropped and color adjusted; adaptations of BY-SA photos are shared under the same license. Licenses: BY-SA 4.0 https://creativecommons.org/licenses/... · BY 2.0 https://creativecommons.org/licenses/... Ompahan-vaan-tunnari (BY-SA 4.0): https://commons.wikimedia.org/wiki/Fi... Tino Rossini / Stradablog (BY 2.0): https://commons.wikimedia.org/wiki/Fi... https://commons.wikimedia.org/wiki/Fi... https://commons.wikimedia.org/wiki/Fi... #TruckingHistory #FullerRoadranger #Transmissions