H-drive H-drive An H-drive drivetrain is a system used for heavy off-road vehicles with 6×6 or 8×8 drive to supply power to each wheel station. H-drives do not use axles but rather individual wheel stations, usually carried on a punt chassis. A single differential splits the drive into separate left and right drive shafts, which each run fore and aft inside the bottom corners of the chassis. At each wheel station a bevel box drives the half shaft out to the wheel. H-drive is not commonly used for 4 wheel vehicles, as it is relatively complicated for small vehicles. It has
National Motorists Association National Motorists Association The National Motorists Association (NMA) is for-profit non-stock corporation lobbyist and special interest group in North America, created in 1982. NMA also operates a small non-profit organization, National Motorists Association Foundation, established in 1999. The NMA, originally called the Citizens Coalition for Rational Traffic Laws (CCRTL), was founded in 1982 to advocate against the 55 mph National Maximum Speed Law, which was their chief cause until its successful repeal in 1995. The National Motorists Association name was adopted in the late 1980s. The NMA encourages motorists to challenge all traffic tickets in court. To promote this, through