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
Lake Shore Drive and an outer drive. The original inner drive (or local) is used for slower local traffic and is connected to the street grid. The local drive runs from downtown in Streeterville to LaSalle Drive, (becoming Cannon Drive). Then the inner drive reappears just south of Diversey Parkway (approx. 2800n), continuing north to Irving Park Road (4000n). The portion from Belmont (3200n) to just south of Irving Park (4000n) was previously named Sheridan Road (which can still be seen carved in stone in at least one vintage high-rise). The outer drive (or express) with limited-access runs from the south side of