Chrysler RFE Transmission - 45RFE and 545RFE

45RFE and 545RFE

The 45RFE was introduced in the Jeep Grand Cherokee in 1999, it is notable for including three planetary gearsets rather than the two normally used in a 4-speed automatic. It also features three multiple disc input clutches, three multiple disc holding clutches, and a dual internal filter system (one primary filter for transmission sump, one for the fluid cooler return system). In the 45RFE applications four gears are utilized, with a different (1.50:1 rather than 1.67:1) second gear to increase versatility when downshifting. In 545RFE usage, an extra taller overdrive ratio is also used. Chrysler decided to refer to it as a "multi-speed automatic".

The 45RFE was produced at the Indiana Transmission plant in Kokomo, Indiana. It was normally paired with the 4.7 L PowerTech V8.

The 45RFE later became the 5-speed 545RFE.

• Gear Ratios:
  • 1st 3.00:1
  • 2nd 1.67:1
  • 2nd Prime 1.50:1
  • 3rd 1.00:1
  • 4th 0.75:1
  • Reverse 3.00:1
• 545RFE only:
  • 5th 0.67:1

Applications:

• 45RFE
  • 1999–2000 Jeep Grand Cherokee (4.7L)
  • 2002–early 2003 Jeep Liberty (3.7L)
  • 2000–2002 Dodge Dakota (4.7L)
  • 2000–2002 Dodge Durango (4.7L)
  • 2002 Dodge Ram 1500 (3.7L and 4.7L)
• 545RFE
  • 2001–2011 Jeep Grand Cherokee (4.7L, 4.7L H.O., 5.7L Hemi)
  • 2002–2007 Jeep Liberty (Diesel applications)
  • 2003–2011 Dodge Ram (3.7L, 4.7L, 5.7L Hemi)
  • 2005–2011 Dodge Power Wagon
  • 2003–2011 Dodge Dakota (4.7L, 4.7L H.O.)
  • 2003–2011 Dodge Durango (4.7L, 5.7L)
  • 2006–2010 Jeep Commander (4.7L, 5.7L Hemi)
  • 2007–2010 Jeep Wrangler (2.8 L CRD)
  • 2007–present LTI/London Taxi Company TX4