Strengthen your drivetrain with the BD Diesel 1064194F TowMaster 48RE Transmission, built for 2003–2004 Dodge Ram 2500/3500 4WD trucks equipped with the 5.9L Cummins. Designed to solve the known limitations of the stock transmission, this package features upgraded internals, optimized line pressure, and enhanced cooling through BD’s heavy-duty aluminum pan. With BD’s TapShifter-ready wiring and control module included, it’s a smart long-term solution for daily driving and towing—without sacrificing OEM driveability.

BD torque converter required for warranty. $1,800 core charge applies.

✅ Key Features

🔧 Transmission Highlights

• BD upgraded valvebody with 190–200 PSI line pressure

• Clutch Packs: OD (6), OD Direct (10), Forward (5), Direct (6)

• High-temp Raybestos energy band for extended wear resistance

• Modified manual valve for lubrication in all gear positions

• Roller Torrington thrust bearings replace stock bushings

• Upgraded governor solenoid and transducer (2x burst strength)

• Drilled intermediate shaft improves fluid flow

• Cooler line case saver to protect against transmission failure

• BD rigid aluminum transmission pan with +2qt capacity

• Heat-dissipating fins & magnetic drain plug

• BD full-flow auxiliary filter kit

• Dyno-tested prior to shipment

• Optional billet input shaft available

• Not designed for race or sled pull applications

🕹️ Control Module Integration

• BD control module, shift lever, and digital gear display included

• Gear limiting function and torque converter lock-up control

• Plug-and-play sealed wiring – no cutting or splicing needed

• Converter sold separately (see Part: 1070247X)

(BD Diesel Transmissions only have warranty when running a BD Trans & Converter)

🚙 Vehicle Compatibility

Fits the Following Applications:

• 2003 Dodge Ram 2500/3500 4WD 5.9L Cummins

• 2004 Dodge Ram 2500/3500 4WD 5.9L Cummins

For 48RE automatic transmission-equipped trucks.

📦 What’s Included

• BD TowMaster 48RE Transmission – Part #: 1064194F

• BD Heavy-Duty Aluminum Transmission Pan

• BD Auxiliary Full Flow Transmission Filter Kit

• Shift Lever, Control Module, Gear Display, and Wiring Harness

• Pre-installed upgraded solenoids, transducer & internal components

🛠️ Why Choose BD Diesel?

BD Diesel has earned its reputation by developing high-performance driveline solutions that fix the common failure points of factory components. This 48RE transmission upgrade comes dyno-tested and packed with thoughtful engineering—from roller bearings to pressure optimization and heat management. Whether you’re towing or daily driving, BD gives you the shift quality and durability your 5.9L Cummins deserves.