The 5.9-liter Magnum V8 in Dodge Ram 1500s nearly always paired with a four‑speed automatic transmission from Chrysler’s 46RE family. In some heavier‑duty or later builds, a 47RE was used, and there was no factory manual option for the 1500 with this engine. Exact equipment varies by year and trim, so check the specific vehicle’s build data to confirm.
This article explains the 5.9 Magnum engine, the transmission options that were commonly paired with it in Ram 1500 pickups, how those configurations varied over time, and how to verify the exact transmission on a given truck. It also covers maintenance considerations and how to identify the correct setup for your vehicle.
Overview: the 5.9 Magnum and its drivetrain
The 5.9 Magnum is Chrysler’s 360 cubic‑inch V8, widely used in Dodge Ram trucks during the late 1990s and early 2000s. When paired with the Ram 1500, the engine was typically mated to a four‑speed automatic transmission, with the 46RE family being the most common option. In some heavy‑duty configurations, a 47RE was used. Factory manuals were not standard for the 1500 with the 5.9 Magnum, making the automatic the predominant choice for this engine in the 1500 line.
Common transmission configurations for the 5.9 Magnum Ram 1500
Below are the configurations most frequently seen with the 5.9 Magnum in Ram 1500 pickups. The exact transmission can vary by year, drivetrain, and trim level, so verify with the vehicle’s documentation.
- 46RE/46RH four‑speed automatic: The standard setup for most 5.9 Magnum Ram 1500s. The 46RE is electronically controlled; the 46RH is the hydraulic variant.
- 47RE four‑speed automatic: Used in some heavier‑duty Ram configurations (more common on 2500/3500, but present in certain early‑2000s builds). Less common on the 1500, but possible in some options.
- Manual transmissions: Not typically offered with the 5.9 Magnum in the Ram 1500 lineup. Manual options were generally reserved for other heavy‑duty Dodge trucks, not the standard 1500 with this engine.
In practice, the most prevalent setup for a 5.9 Magnum Ram 1500 is the 46RE/46RH automatic, with the 47RE appearing mainly in heavier HD variants rather than standard 1500 configurations.
How to verify your specific vehicle
To determine the exact transmission in your truck, use these steps. The process helps account for year‑to‑year changes and any regional or dealer‑specific configurations.
- Check the transmission housing for a code tag or stamping that identifies 46RE, 46RH, or 47RE.
- Review the glovebox build sheet or the vehicle’s original window sticker (often called the Monroney label) for the RPO/transmission code.
- Decode the VIN with a trusted source or a Dodge/Mopar dealer to confirm the transmission code associated with your exact vehicle.
- Inspect the transmission crossmember, pan shape, and linkage; these physical cues can help distinguish between 46RE/46RH and 47RE variants.
Because configurations varied by year and region, the most reliable method is to confirm with the vehicle’s paperwork or by decoding the VIN. If in doubt, consult a Dodge/Mopar service professional.
Maintenance considerations for the 5.9 Magnum Ram 1500 transmission
Regular maintenance is key to longevity. Use the manufacturer‑specified automatic transmission fluid and service interval. Avoid overheating, ensure the cooling system is in good condition, and address slipping, hard shifting, or warning lights promptly with a qualified technician. Towing, heavy loads, or extreme duty can accelerate wear, so monitoring gear shifts and fluid condition is especially important in these situations.
Summary
The 5.9 Magnum Ram 1500 most commonly used a four‑speed automatic from the 46RE family, with the 47RE appearing in some heavier‑duty configurations. There was no standard factory manual option for the 1500 with this engine. Because configurations varied by year, trim, and region, the exact transmission should be verified using the vehicle’s build data, VIN, or dealer records.
What transmission came with the 5.9 Magnum?
Which Transmission Do I Have?
| Transmission | Engine(s) | Typical Model Years |
|---|---|---|
| 46RE | 5.2L / 5.9L Magnum (Gas) | ~1996–2002 |
| 47RE | 5.9L Cummins (Diesel) | ~1996–2002 |
| 48RE | 5.9L H.O. Cummins (Diesel) | ~2003–2007 |
| 66RFE | 5.7L / 6.4L HEMI (Gas) | ~2012–2018 |
What years did Dodge use the 46RE transmission?
This transmission was home in the robust Dodge Ram 1500, 2500, and 3500 trucks, along with select Dodge Dakota and Dodge Durango models. It was offered in two exciting variations: 46RH (Hydraulic) – Used from 1988-1995. 46RE (Electronic) – Used from 1996-2003.
What are common 5.9 Magnum problems?
Quick Answer. The most common 5.9L Cummins issues involve fuel delivery (lift pump/VP44/injectors), exhaust manifold cracking, sensor/ECM-related drivability problems, and turbo wear. Use symptoms (hard starts, low power, smoke, exhaust smell, poor idle) + a scan tool to confirm the cause before replacing components.
What is the difference between 45RFE and 545RFE?
The 45RFE and the 545RFE transmissions are mechanically identical. The notable difference comes down to software. The 545RFE transmission has an electronically activated fifth gear. You will also notice that the unit control module and solenoid pack is different in both transmissions.