Diesel engines have high torque but low rpm operating ranges, and carry heavy loads.
The range of gears allows the truck to get moving with a load and bring it up to speed utilizing the best operating conditions of the engine.
That way a reasonable engine size can be used, to operate like a passenger car the engine would have to be the size of the entire cab of the truck, and would use an outrageous amount of fuel.
Transmission gears? In the transmission.
It could be anywhere from five to 18.
Yes it does.
There is no maximum. The manufacture could theoretically put as many gears as they want. Mercedes Benz has a 7 speed transmission & Chrysler has an 8 speed transmission. Long haul semi-trucks have 26 gears ratios or more.
How much weight it can tow or carry and how much you need it too. How many gears it has and how easy it is to steer and shift.
Yes
Tracker Trucks can be purchased in many places. Teletrac, Tracker Trucks, The Longboard Store, So Cal Skate Shop, and many other boarding supply shops sell tracker trucks.
Super low, and then 1 - 4, so 5 gears total plus reverse.
it has 6 gears
5 gears
12 forward gears and 4 backward gears
6 gears and neutral.