What sort of dump truck would be a question here. Typically transmissions for dump trucks (tandem axle and heavier) would include the Allison five, six, and seven speed automatic transmissions, and, as far as manual transmissions go, 8LL, 9, 10, 13, and 18 speed transmissions, like those found on road tractors (save for the 8LL, which is a bit rare to see on a road tractor). It sounds like you're referring to either a 5+2 transmission, which is basically a five speed with a rear end that has two rear end speeds, or possibly the Mack MaxiTorque transmission, which is essentially a five speed with a low gear setting.
0.9808
51: 51, 102, 153, 204, 255. 52: 52, 104, 156, 208, 260.
The average of the numbers 51, 52, and 56 would be 53.
52
3/52*13/51+1/52*12/51= .01923
Abraham Lincoln was about the age of 51 when he was elected as the president.
Um...52?? if you said what will be the number be after 51?
51
52
52
52
50