The fourth-generation Transit is offered in a rear-wheel drive powertrain layout; the front-wheel drive version of the previous generation has been replaced by the Transit Custom. The Transit van is offered in two wheelbases (129.9 inches and 147.6 inches) while the chassis cab/cutaway van is offered in three wheelbases (138 inches, 155.7, and 178 inches). As with previous-generation vans, extended-wheelbase vans were produced with either single or dual rear-wheel axles (the latter, a first for North America, which previously reserved the design for chassis/cutaway cabs).