Chevrolet redesigned its AWD transfer case for its 1999 Chevrolet Astros. The new system transfers power from the rear wheels to the front, improving traction and driver control, whenever it senses wheel slippage.
The 1999 Chevy Astro LT AWD is almost identical to the Astro LT 2WD. For some reason, a rear window defroster was standard on the 2WD version but was an option on the LT AWD. The AWD handles snow and rough roads better than the 2WD, but is heavier, has less towing capacity, and gets poorer fuel economy than the 2WD.
Owners rave about the handling of the 1999 Chevrolet Astro LT AWD, as well as its comfort and roominess. However, many owners say it has its share of mechanical problems, including the brakes and electrical system.