Trucks
Many light trucks have dog-leg five- or six-speed transmissions, due to the fact that second gear is fine for taking off normally, first is considered a crawler gear in these trucks and is only ever used for taking off with heavy loads and/or a trailer, or going down very steep grades.
The dog leg gearbox is also typical of nine- and ten-speed heavy-truck transmissions. In the case of a ten-speed transmission, the gears are 1–5 in the low range and 6–10 in the high range (the 1 position is not used in the high range of a nine-speed transmission).
Read more about this topic: Dog-leg Gearbox