48RE Performance Transmission Road Boss 400 Dodge 03-07
$4,750.00
ROAD BOSS 400
Daily Driver/Light Towing
2003-2007 Dodge/RAM
This transmission was designed for trucks with up to 450 horsepower. It is the perfect fit for the daily driver that does occasional light towing. (Less than 12,000 lbs) This build includes many performance benefits with a price tag comparable to a stock rebuild.
Horsepower Rating: 400 rear wheel
Transmission Warranty Information: 12 Month Craftsmanship Warranty
The 68RFE ROAD BOSS 400 hp transmission includes:
- Low Stall Billet Cover Single Disk Converter
- RedLine Spec Clutches and Steels with Additional Clutches in Direct
- Upgraded 2nd Gear Band
- Billet 4.2 Lever
- Billet Band Strut
- Tig Welded Planetary Hubs
- RedLine Servo Upgrade
- All New Bearings
- New Teflon-coated Thrust Washers
- Gaskets and Seals
- RedLine High-Pressure Custom Built and Dyno Tested Valvebody
- Rebuilt and blueprinted Front Pump
- New OD/LU Solenoid pack
- Upgraded Governor Sensor and Solenoid
- New MOPAR Filter
- Bead Blasted Transmission Case Painted in High-Quality Enamel Paint
- Stock Transmission Pan
Quantity
Installation Info
In Stock- Available Now
How RedLine Builds it Better
How RedLine Builds It Better!
Expert Craftsmanship
Every transmission is hand-built by seasoned builders who understand the difference between “good enough” and “overbuilt.” We believe in going the overbuild route. Instead of rushing jobs or using cookie-cutter rebuild kits, RedLine takes the time to precision-machine, measure, and assemble each unit so it’s tuned to last tens of thousands of miles under real-world stress.
Specific Brand & Platform Knowledge
You don’t just “do transmissions.” You specialize in Cummins Dodge/RAM and Duramax Chevy/GMC platforms, which means you know the quirks, weak points, and exact part combinations that actually work in these trucks. This expertise ensures builds are not only stronger but also tailored for each application—whether it’s towing, daily driving, or performance horsepower.
Proprietary Build Recipes & Tested Combinations
RedLine has developed its own proven build recipes that eliminate factory weak points and balance performance with durability. These aren’t off-the-shelf packages—they’re field-tested setups refined over thousands of transmissions, backed by real-world data and customer feedback.
Real-World Testing & Validation
Before a RedLine transmission goes out the door, it’s not just assembled—it’s tested, validated, and proven under real-world conditions. From line pressure checks to hot flush verification and test-drives, every unit is verified to perform the way it should. This extra layer of quality control ensures customers drive away with confidence, knowing their build has already been put through its paces.
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