A selected sort of drivetrain part includes a gear-driven unit that transmits energy from the transmission to the axles, enabling four-wheel drive functionality. This unit is mounted individually from the transmission, related by a driveshaft. An instance software of this setup may be present in sure older vans and off-road autos the place design constraints or particular efficiency traits necessitated this configuration.
This configuration gives a number of benefits, together with elevated flexibility in automobile design, permitting for better wheelbase variations and simpler adaptation to completely different chassis configurations. It additionally simplifies upkeep and restore, because the unit may be eliminated and serviced independently of the transmission. Traditionally, this design was prevalent in autos requiring sturdy and dependable four-wheel drive programs, contributing to their sturdiness and longevity in demanding environments.