This video showcases the construction of a tandem axle trailer, highlighting the step-by-step assembly process. It also demonstrates the repair of damaged gearbox teeth, detailing techniques to ...

“SAF Trak” axle is powered from the tractor’s hydraulic wet kit. On the trailer, two hydraulic motors, one at each axle end, turn the wheels to help get the rig moving in slippery conditions.

A hybrid electric-drive trailer tandem being developed by a group of engineers at Hyliion Inc. in Pittsburgh, Pa. The device, which for now has no official name, is undergoing road testing and ...