Chrysler RFE Transmission - 68RFE

68RFE

The 68RFE was introduced in 2007 Ram 2500 and 3500 Pickups with the 6.7L Cummins ISB Diesel engine. It is not currently used in 2007-present Ram 3500/4500/5500 cab chassis. Transmission in these models is the Aisin AS68RC.

The basic design and operation is the same or similar to the 45 and 545RFE counterparts with the following exceptions:

• larger bellhousing with different bolt pattern and cutout to accommodate diesel engine
• modified internal components to handle increased torque of diesel engine
• revised gear ratios and Transmission Controller programming for larger application
• no 2nd gear prime for downshifting like the 45RFE and 545RFE transmissions

• Gear Ratios:
  • 1st 3.23:1
  • 2nd 1.83:1
  • 3rd 1.41:1
  • 4th 1.00:1
  • 5th 0.81:1
  • 6th 0.62:1
  • Reverse 4.44:1

Applications:

• 2007–present Dodge Ram 2500 and 3500 Pickup (6.7L Cummins ISB Diesel)