Auto, B 61 Mack tri-plex 15 speed gearbox by catalin July 18, 2019, 5:54 am A real truck driver. Here’s how to change gears on a B 61 Mack tri-plex 15 speed truck.Today most drivers prefer to buy cars with automatic gearboxes. It’s impressive to see how the gears are changing to such a truck.See morePrevious article When you go on the highway 350 km / h and someone trolls youNext article Big aircraft engines starting up
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