Chrysler 66RFE 6-Speed Automatic · Chrysler/Dodge/Jeep/RAM · Expert rebuild service since 1987. Lifetime warranty. Free diagnostic.
2012–present RAM 1500 (5.7L Hemi, heavier applications); 2012–present Dodge Challenger/Charger (5.7L/6.4L); heavier-duty 6-speed gas variant
| Configuration | 6-speed automatic with overdrive — heavy-duty gas Hemi variant |
|---|---|
| Gear Ratios | 1st 3.59:1 · 2nd 2.19:1 · 3rd 1.41:1 · 4th 1.00:1 · 5th 0.84:1 · 6th 0.67:1 · Rev 3.16:1 |
| Fluid Type | Mopar ATF+4 |
| Fluid Capacity | 14.5 qts total, 7.0 qts service refill |
Same solenoid pack failure pattern as 65RFE but under higher Hemi torque loads.
Symptoms: Limp mode; P-codes; erratic shifts under hard acceleration
TCC shudder under hard driving and high Hemi torque.
Symptoms: Shudder at 45–65 mph
6th-gear OD clutch wear in performance Hemi applications (Challenger/Charger).
Symptoms: Slip in 6th gear; drops from OD under wide-open throttle
Solenoid pack replaced. TCC inspected. OD clutch pack replaced. All clutch packs replaced. Valve body rebuilt. Full ATF+4 soft parts kit.
ATF+4 every 30,000 miles. Performance Hemi applications (Challenger/Charger): service every 25,000 miles.
Yes — it handles the 5.7L and 6.4L Hemi power at stock levels well. A rebuild with upgraded clutch packs handles 500+ hp.
The 68RFE is for Cummins diesel; the 66RFE is for high-torque gas Hemi applications. Different torque ratings and some different internal components.
$2,000–2,800.
Mopar ATF+4.
2–3 days.
Free diagnostic, written estimate, lifetime warranty. Chicago's 66RFE rebuild specialists since 1987.
