Since its 1961 launch as Ford F-Series replacement the E-150 has modified throughout five design iterations to become an important full-size van for the U.S. market. During its generations the Ford E-150 came standard with a 170 cubic inch engine with a 240 cubic inch optional variant which has always focused on delivering reliable performance. Initially the early versions provided a three-speed manual gearbox that briefly included a four-speed Dagenham transmission which came in 1963. The E-150 evolved into a heavier model using F-Series pickup components, while retaining its rear-wheel drive configuration with a single rear axle. A twin I-beam suspension transition brought better driving dynamics along with more stable and responsive handling to the vehicle. The Ford E-150 received a new chassis body-on-frame structure in 1975 so it transitioned into both becoming a popular passenger vehicle along with becoming a multi-purpose platform for ambulance and bus conversions. The mid-engine configuration in the first-generation E-150 provided improved storage space and easier access to the engine by positioning it between the driver and passenger seats. Over its production the Ford E-150 successfully dominated its segment by obtaining a large share from competitors. The performance and durability of a Ford E-150 depends on using genuine Ford parts that match original standards for reliable satisfaction of vehicle owners.