Stellantis said on Tuesday it will deploy a new vehicle system that will support assembly of gasoline, hybrid and electric models, but in a sign of how turbulent the electric-vehicle transition is, the automaker also delayed production of Ram electric pickup trucks.

The REEV (range extended electric vehicle) system, like that in the RamCharger, consists of a battery, front and rear electric drive motors and an on-board generator/internal combustion engine. The engine/generator never powers the wheels, only creating electricity for the motors. All STLA Frame vehicles will have all-wheel drive.