Ram 66RFE / 68RFE (Hemi) transmission tune
2014–2024 Ram 2500/3500 — 6.4 Hemi, 5.7 Hemi
What we change on this platform
Same shift-firmness, shift-point and converter work as the Cummins trucks, tuned for the Hemi's torque curve. Gas HD trucks run the transmission from the PCM, so this is a PCM file.
What your truck needs first
By model year, from HP Tuners' current support list. This is the owner's side of the job — interface, licensing credits, and any one-time module upgrade.
| Model years | Module | Status | Interface | Credits |
|---|---|---|---|---|
| 2014 | GPEC2 PCM | Ready to tune Transmission is controlled by the PCM; no service needed on 2014. | MPVI2 or newer | 2 |
| 2015–2017 | GPEC2A PCM | Send-in service first HP Tuners' Dodge PCM Service: send-in upgrade (about $250, 2–4 business days) or a new pre-upgraded PCM. Required even for transmission-only tuning — the 66RFE is run by the PCM. | MPVI2 or newer | 2 |
| 2018–2024 | GPEC2A PCM | Send-in service first Dodge PCM Service as above, plus the Smart Access cable for the security gateway. | MPVI2 or newer + Dodge 2018+ Smart Access cable | 2 |
What you send us
- A fresh read of the vehicle saved as a .hpt file, from a module that's already upgraded if yours needs it
- Your mod list, if anything's been changed: converter, gears, tires, lift, built unit
Price
$179 for the Transmission Tune, $249 with the driveability package. One business hour turnaround, one revision included.
Order the Ram 66RFE / 68RFE (Hemi) tune