The humming hub of your Ford Ranger's engine is the 5R55E transmission, a computer-controlled rear-wheel drive automatic transmission manufactured by Ford and the first five-speed automatic ever made by an American automaker. Ford made these transmissions for two and four-wheel drive vehicles, also. You can spot the 5R55E in several Ford brands, such as Mercury and Lincoln, as well as Rangers from 1997. It is mechanically identical to the four-speed 4R55E, but it can produce five forward gears due to enhanced software control. Other upgraded features for the 5R55E include advanced friction-to-friction shift ability and adaptive shift control. The design of the transmission makes it perfect for the high torque 4.0-liter SOHC engine, as well as the 4.0-liter OHV Cologne SOHC V6 engine. If you want a trailblazing product that takes a four-speed unit and gives it an extra forward gear by way of computer wizardry, then search the vast inventory on eBay for a 5R55E transmission that can get you up that next hill.Shop the large inventory of motors, parts, accessories, and complete auto transmissions for Mazda!