As such, the hand - build cars are get a special solid rear axle in lieu of production - version independent rear axle, along with racing suspension and chassis components. (motoring.com.au)
There's also a new front independent suspension, but the rear retains its old - school solid rear axle. (cnet.com)
All Chassis Cab models include a stout Hotchkiss ® leaf spring rear suspension with solid rear axle, while 5500 models have a maximum Gross Rear Axle Weight Rating (GRAWR) up to 13,500 lb (6,123 kg). (ramtruck.ca)