the drivetrain consisted of one engine, the straight-6-cylinder, in conjunction with a three-speed automatic transmission (a version of chrysler's a998), with dana 30 and dana 35 differentials. all 1980 eagles came standard with a permanent four-wheel-drive system that employed a new process 119 transfer case that had a viscous fluid coupling that allowed the four-wheel-drive system to operate on wet or dry pavement without causing undue suspension and drivetrain wear. optional trailer towing packages were available for handling trailers weighing up to that included a weight distributing (equalizing) tow hitch, seven-connector wiring harness, wiring, auxiliary transmission oil cooler, 3.54 axle ratio, and required the optional heavy-duty battery and automatic load-leveling air shocks.