The 2001 Ram 1500 with the 5.9-liter Magnum V8 typically uses a four-speed automatic transmission, the 46RE (often referred to as the A518 in some references). A factory manual option was not offered on most 1500 models that year.
Drivetrain context and what the 46RE means
The 5.9 Magnum V8 paired with the 46RE automatic was a common setup in late-1990s and early-2000s Ram 1500 pickups. The 46RE is a four-speed automatic with electronic control, designed to handle the torque of the 5.9 engine and provide overdrive for highway efficiency.
Transmission options for the 2001 Ram 1500 5.9
Before listing the options, note that factory guidance for 2001 Ram 1500s with the 5.9 engine points to the 46RE automatic as the standard configuration. There was no widely advertised factory manual option for the 1500 lineup in that model year.
- 46RE 4-speed automatic transmission (electronic control; the typical setup behind the 5.9 Magnum in 1500s)
- Manual transmission option: not offered on most 2001 Ram 1500 5.9 pickups
In practice, owners with the 5.9 in a 2001 Ram 1500 should expect the 46RE automatic, which aligns with maintenance and parts guidance for that era in the Mopar ecosystem.
Identifying and verifying the transmission you have
If you’re trying to confirm the exact transmission in a specific truck, a quick check helps: look for the transmission code stamped on the bell housing or consult the vehicle’s build sheet/door sticker for the drivetrain configuration. The presence of a four-speed, electronically controlled unit is characteristic of the 46RE setup used behind the 5.9 Magnum in these trucks.
Why this matters for maintenance and repairs
Knowing the correct transmission is essential for parts compatibility, fluid type, and service procedures. For the 46RE, use the recommended Mopar or equivalent ATF and follow the service intervals suitable for a late-90s to early-2000s electronic-controlled, four-speed automatic. Replacement parts and rebuilt units are generally available through Mopar dealers and aftermarket suppliers that support 46RE/A518 transmissions.
Summary
The standard transmission for a 2001 Dodge Ram 1500 with the 5.9-liter Magnum is the 46RE four-speed automatic. A factory manual option was not common for this model year, reinforcing the automatic as the prevailing configuration for most 1500 pickups with the 5.9 engine.
What transmission is in a 5.9 Magnum Ram 1500?
Which Transmission Do I Have?
| Transmission | Engine(s) | Notes |
|---|---|---|
| 46RE | 5.2L / 5.9L Magnum (Gas) | Ram 1500/Van applications |
| 47RE | 5.9L Cummins (Diesel) | Early 2500/3500 |
| 48RE | 5.9L H.O. Cummins (Diesel) | 2500/3500 |
| 66RFE | 5.7L / 6.4L HEMI (Gas) | Primarily 2500/3500 HEMI |
What trucks have a 47RE transmission?
Transmission Fitment
The Dodge 47RE transmission is a four-speed automatic transmission that was implemented in 1994-2002 Dodge Ram 2500 and 3500 trucks. The 47RE is an update of Chrysler's A727 design.
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.
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.