The ultimate off-road machine: The Ram Rebel TRx Concept

One look at the Ram Rebel TRX concept and its intentions are clear — a 575-horsepower off-road machine with the ability to clear miles of desert in the blink of an eye.


Ram, America’s off-road truck leader, today introduced the Ram Rebel TRX concept. Rebel TRX is a 100-mph off- road machine with 575 horsepower – the most powerful half-ton truck the company has ever built. Ripping over pavement at speeds greater than 100 mph is an experience, but the Ram Rebel TRX concept hits triple digits in an off-road environment with the help of a supercharged 6.2-liter HEMI® V-8.

A 40 percent increase in suspension travel and 37-inch tires contribute to incredible ground clearance. This combination allows the TRX concept to overcome surface obstacles at high speed. Although it is clear that the line and color combinations are borrowed from the popular Rebel and Power Wagon models, the Ram Rebel TRX has a much more chiseled look.

When traversing rough terrain at high speeds, seating is important. The interior design team chose suede with accent mesh cloth inserts to cover the rear bench and front buckets. The suede inserts provide tremendous grip to clothing. The front seats integrate lateral support upper bolsters with embroidered logos. All four seats are strapped with six-point harnesses, further fixing occupants to their proper locations.

“With 575 supercharged horsepower and a suspension system built to withstand an all-day hammering, the Rebel TRX concept can devour the roughest terrain at more than 100 miles per hour and never look back,” said Mike Manley, Head of Ram Brand, FCA – Global.

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The rapidly beating heart of the Ram Rebel TRX concept is a powertrain marvel. A 6.2-liter supercharged HEMI with 575 horsepower, the most powerful Ram 1500 the company has ever built, lays the groundwork of expectation.

Mated to the TorqueFlite 8HP70 eight-speed automatic transmission, new calibrations were used for the engine, transmission and drivetrain to optimize the expected high-speed off-road driving cycle.

The Ram Rebel TRX concept uses Ram’s 4×4 Performance Control System with a BorgWarner 44-45 transfer case. The system employs different modes of operation: Normal, Wet/Snow, Off-road and Baja.

The Ram Rebel TRX concept uses a standard Ram 1500 front axle with an open differential and custom CV half- shafts to handle the wider track dimension. The spindles are moved forward to make room within the fender wells for the aggressive 37-inch tires.

In the rear, a Dynatrac Pro 60 axle spools power through an electric, selectable locker to 35-spline, 1.5-inch axle shafts. The locker is available in all modes and commits both rear wheels to traction at the same speed, spreads the torque load and maximizes the tractive effort (power put to the ground) in full-throttle maneuvers.

High-speed off-road truck racing teams commonly use a 37-inch tire for its height and durability. Tires with 37 inches of height, 13.5 inches of width, aggressive treads and 10-ply design are assigned the task for Rebel TRX. The Rebel TRX concept also features custom beadlock wheels from Mopar. Beadlock wheels provide additional tire-holding strength by pinching the outside of the tire to the rim. The Rebel TRX carries two complete spare tire and wheel packages. Tools and jack are located in custom, lockable storage between the wheels in the bed.