Experienced Chrysler 45RFE / 545RFE specialists since 1987. Free computer diagnostic, lifetime warranty on rebuilds.
The 45RFE and its 5-speed variant the 545RFE were Chrysler's primary automatic for trucks and SUVs in the early-to-mid 2000s. Common in Jeep Grand Cherokees, they're a moderately robust unit with well-known failure points: the overdrive clutch pack and governor pressure solenoid. We see many of these on Chicago-area Grand Cherokees.
| Speeds | 4 (45RFE) / 5 (545RFE) |
| Type | Automatic RWD/4WD |
| Fluid | ATF+4 |
| Fluid Capacity | 9.5 qts |
The GP solenoid is the most common failure — causes P0745, harsh shifts, and erratic pressure regulation.
Symptoms: P0745, harsh shifts, delayed engagement
O/D clutch burn-out causes loss of 4th/5th gear, especially in towing applications.
Symptoms: No O/D, slip at highway speed
Input clutch failure causes loss of 1st and 2nd gear drive.
Symptoms: No movement in D or 1, slipping from stop
"Honest diagnosis, fair price, and the repair was done right. Chicago Transmission has been my go-to for years. Wouldn't trust anyone else with my car."
"The free diagnostic alone was worth the trip. They found the problem fast, gave me a written estimate, and completed the work on time. Exceptional service."
"Family owned and it shows. They treated my car like it was their own. The lifetime warranty on my rebuild gives me total peace of mind. Highly recommend."
The 545RFE adds a true 5th gear (overdrive). Many trucks came with the 545RFE but only a software/hardware upgrade separates them from the 45RFE.
Very common — it's the first thing we check on 45RFE/545RFE complaints. P0745 is the diagnostic code.
For a well-maintained body, yes. These trucks have good value and a rebuild is cost-effective.
3–4 days.
Yes — the 545RFE was paired with the 5.7L HEMI in Grand Cherokee and Durango applications.
Bring it to Chicago's most experienced Chrysler 45RFE / 545RFE shop. Free diagnostic, written estimate, no obligation.
