The Gen 3 Hemi (5.7L, 6.1L, 6.4L) uses different bellhousing bolt patterns depending on the application and year. This means older Mopar automatics require careful evaluation — and often an adapter — before they can be used with a Hemi.
GEN 3 HEMI TRANSMISSION APPLICATIONS:
Older Gen 3 Hemi applications (2003–approximately 2008) use transmissions from the 46RE/47RE/48RE family in truck applications, and the 45RFE/545RFE in car/SUV applications. The bellhousing bolt pattern in these applications is specific to the engine/transmission combination.
Newer Gen 3 Hemi applications use: • 545RFE (5-speed electronic, car and truck) • 65RFE (6-speed electronic, Ram trucks 2012+) • NAG1 / W5A580 (Mercedes-sourced 5-speed automatic, used in SRT and sports car applications)
CAN YOU USE AN OLDER 727 OR 904 TORQUEFLITE? The classic 727 and 904 Torqueflite transmissions use a different bellhousing bolt pattern than the Gen 3 Hemi. These transmissions were designed for the older LA-series and B/RB-series Mopar engines. To mate a 727 or 904 to a Gen 3 Hemi, you need a custom bellhousing adapter. These adapters are available from several Mopar performance suppliers.
BEFORE ORDERING: Confirm the following: 1. The exact year and model of your vehicle 2. Which Gen 3 Hemi you have (5.7L, 6.1L, or 6.4L) 3. Which transmission you are attempting to use
With these details, we can confirm compatibility or point you to the right adapter solution. Call 1-844-XPARTS-1 or email support@expediaparts.com.
