The 45RFE automatic transmission, referring to its Rear wheel drive design and Full Electronic control system, was introduced in Chrysler’s Jeep Grand Cherokee for the 1999 model year. The 45RFE is known for its three planetary gearsets as opposed to the two normally used in 4-speed automatics. Also referred to as a “multi-speed automatic”, the 45RFE was commonly paired with the 4.7L PowerTech V8 engine. Speedway Motors carries all the top quality parts you need to keep that 4-speed RFE transmission performing at its best. Whether you’re working on a Ram, Dakota, or Jeep Grand Cherokee, be sure to shift into high gear with Speedway Motors, and get the latest and greatest in RFE aftermarket and performance components.