As many as the transmission the customer orders with it has. Could be as few as four or as many as 18.
Commercial Truck Trader and International Truck are the two companies that sell many used international dump trucks at good prices. Buyers can also find such products on eBay.
For a North American truck, most of your average fleet trucks will run either a 9 or 10 speed transmission. Owner/operator and heavy haulers tend to have more gears - 13, 15, or 18 (15 speeds are a bit uncommon, though).
If you are asking about how many gear ranges the transmission has, the auto has 3 and the manual has 5. If you are asking about how may total gears the truck has, when you add up the rear axle, transmission, distributor, steering, etc, there are dozens.
If you want some international truck parts on sale, I would recommend that you go onto an international sales site such as wwww.eBay.com, as there will be many choices and sellers for you to choose from.
it has 6 gears
5 gears
How many gears does big Ben have in the great movie detective
5 gears
6 gears
there are 5 gears
6 gears and neutral.