You have eight running gears, and an auxiliary gearbox effectively allowing you to split the gears. For the running gears, go to a truck driving school - you're not going to learn how to shift an unsychronized transmission by just reading about it.
For the gear splitting, you put the splitter (on the side of the transmission) to the desired postion (forward to increase the ratio, rearward to decrease it), let off the accelerator, pause for a second, then get back on the accelerator. If you don't know what you're doing, DO NOT split the bottom gears - you can tear those up very easily.
As many as the transmission the customer orders with it has. Could be as few as four or as many as 18.
As many as the purchasing agent ordered it with. It could have an Allison automatic with five or six gears, it could have an Eaton-Fuller manual or automatic with 9, 10, 13, or 18 gears, it could have a ZF Meritor automatic with 12 gears.
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).
That bicycle has 18 gears.
There does exist a 21 speed transmission, although I have yet to see one. 18 is the highest you'll normally encounter.
because i want a change a truck and i want t660 kenworth
If you mean an 18 wheeler type truck you have to be 21. I just read a news item about a movement to change the law to 18, but it hasn't happened.
depends on whether you are an offroader or a poser. for real offroad use- get 4.88s, its lower than even the stock 3.73s relative to the original tires. for poser street use- leave them alone, or have daddy shell out a grand for 4.10s or 4.56s
a gearbox with 9 to 18 gears that you use your splitter and you have to rev to a certain point to change gear and double clutch.
The 2000 Peterbilt 330 takes 18" replacement wiper blades on both sides front and a 14" or 15" rear wiper blade.
"Dump truck" (or "tipper") is a pretty ambiguous term. It's simply a truck with a dump body. You could take an older one ton pickup with a three speed transmission, and put a dump body on that. As far as the big ones go, it varies. For some odd reason, the Eaton SmartShift, Meritor, etc. nine through 18 speed speed automatic transmissions haven't been made available for most straight truck applications, so your automatic trucks will have five or six gears (the Allison six speed auto is popular for sitework trucks), whereas manual transmissions will range from eight to 18 gears. The 8LL tends to be more popular for sitework trucks which will go off-road.. the 8LL is basically a nine speed with low reduction gears on the low side. For a dump truck which is doing something exclusively on-road, like stock hauling, the owner may opt for something like a straight nine, ten, 13, or 18 speed, rather than the 8LL, as they're not likely to have any use for the low reduction gears that might be necessary for a sitework truck which would be prone to going off road.
No differences, they mean the same.