Jeep Reveals Wrangler Rubicon 392

Nov 18, 2020

Jeep has introduced the V-8-powered 2021 Jeep Wrangler Rubicon 392, which carries the 6.4-liter V-8, rated at 470 horsepower and 470 lb-ft of torque. Mated to a TorqueFlite eight-speed automatic transmission and Selec-Trac full-time active transfer case, the powertrain rockets the Jeep Wrangler Rubicon 392 from 0-60 mph in 4.5 seconds and the quarter-mile in 13.0 seconds, the company says.

Away from the pavement, the Trail Rated Wrangler Rubicon 392’s powertrain is accompanied by heavy-duty wide track Dana 44 axles, a 3.73 final drive ratio, transmission torque converter lockup control, a 2-inch lift and standard 33-inch tires on 17-inch beadlock-capable wheels.

The result is 10.3 inches of ground clearance; improved suspension articulation and maneuverability; approach, breakover and departure angles of 44.5, 22.6 and 37.5 degrees, respectively; and the ability to traverse up to 32.5 inches of water.

“This is the most powerful, quickest, most capable Jeep Wrangler we’ve ever built,” said Jim Morrison, Head of Jeep Brand – FCA North America. “The factory lift and abundant low-end torque from the V-8 makes the Rubicon 392 the king of the hills, whether you’re rock crawling at low speeds or powering up an incline. And, when pavement replaces dirt, Rubicon 392 makes quick work of the road.”

The 2021 Jeep Wrangler Rubicon 392 goes on sale in the first quarter of 2021.

The addition of the 6.4-liter (392 cubic inches) engine marks the first time in nearly 40 years a V-8 has been a factory option for the Wrangler. Tuned specifically for the Jeep Wrangler Rubicon 392 and its functional hood scoop, the engine is rated at 470 hp and 470 lb.-ft. of torque.

Critical to on- and off-road performance, nearly 75 percent of the Wrangler Rubicon 392’s peak torque is available just above engine idle speed, Jeep says.

The performance of the 6.4-liter V-8 is based on a cast-iron cylinder block and aluminum heads, accented with an active intake manifold, variable camshaft timing, twin spark plugs per cylinder, sodium-filled exhaust valves, hollow-stem intake valves and piston oil cooling jets. The Wrangler Rubicon 392 engine is fitted with a rear-sump oil pan, high-mount alternator and free-flowing exhaust manifolds.

Fuel Saver Technology with cylinder deactivation shifts to a high-fuel-economy four-cylinder mode when engine loads are light, such as cruising on the highway. A tank-mounted high-performance pump keeps the V-8 fueled under even the most demanding conditions.

A functional hood scoop feeds the Wrangler Rubicon 392’s engine with cool, denser, outside air, which leads to enhanced performance.

Jeep engineers ensured the Wrangler Rubicon 392’s V-8 gets fresh air, regardless of the terrain and weather with the Hydro-Guide air intake system, which includes a tri-level ducting system with a series of drains, including a one-way drain in the airbox that separates water – up to 15 gallons per minute – away from the engine’s incoming air. This enables the Wrangler Rubicon 392 to traverse water up to 32.5 inches deep worry-free, even if a bow wake washes over the hood.

Should the Wrangler Rubicon 392’s functional hood scoop become restricted by snow, mud or debris, a secondary air path within the hood structure feeds the engine, making it possible for the Wrangler Rubicon 392 to reach top speed even with a fully blocked primary air path.

An active dual-mode exhaust is standard. The system engages automatically, opening valves in the exhaust system, under higher engine loads to reduce exhaust backpressure. The driver can also activate the system with the press of a button. The dual-pipe performance exhaust system is finished off with unique quad exhaust tailpipes.

A high-torque capacity TorqueFlite 8HP75 eight-speed automatic transmission delivers gear changes and also enables the driver to change gears via the new steering wheel-mounted aluminum paddle shifters, a first for the Jeep Wrangler, or the Electronic Range Select shifter.

The fully electronic, eight-speed automatic transmission features on-the-fly shift-map changing. The transmission software relies on several input parameters to determine the appropriate driving conditions and adjusts shift patterns in response.

The Wrangler Rubicon 392’s powertrain calibration includes Torque Reserve and AMax shifting, accessible when doing a brake torque launch, that delivers maximum acceleration for solid-pavement launches. Torque Reserve, an engine strategy used by drag racers, manages fuel flow to the cylinders and controls spark advance or retard to balance engine rpm and torque to maximize power delivery and launch performance. AMax shifting, a performance-enhancing strategy used on the Jeep Grand Cherokee Trackhawk, maximizes forward torque by coordinating shift time and engine torque management.

The heart of the driveline is a Selec-Trac full-time, active transfer case with a 2.72 low-range gear ratio. The transfer case has four driver-selectable modes: 4WD Auto, 4WD High, Neutral and 4WD Low. This full-time two-speed transfer case constantly sends power to the front and rear wheels. The Selec-Trac transfer case also allows for Wrangler Rubicon 392 to be flat-towed.

The Wrangler Rubicon 392 also features:

Off-road Plus with Sand and Rock modes: The modes adjust throttle, transmission shift points and traction control for peak performance on higher speed passes on sand terrain, as well as during low-speed rock crawling. The Off-road Plus drive mode also gives drivers the ability to lock the rear axle at high speeds while in “4H”

Selec-Speed Control manages vehicle speed in “4L” while traversing off-road terrain without requiring throttle or brake input. Selec-Speed Control is activated using a button on the dashboard and can be adjusted from 1-5 mph simply by using the Electronic Range Select shift control.

The Wrangler Rubicon 392 masters low-speed downhill descents by using the 6.4-liter V-8’s engine braking, revised transmission torque converter lockup control and a 48:1 crawl ratio to manage vehicle speed without the driver needing to use the brake pedal.

The Jeep Wrangler Rubicon 392 chassis includes upgraded frame rails, front upper control arms and cast iron steering knuckles.

The Wrangler Rubicon 392’s is equipped with heavy-duty Dana 44 front and rear axles with thicker axle tubes and Tru-Lok electronic locking differentials. An electronic front sway-bar disconnect maximizes suspension travel. The Wrangler Rubicon 392 also comes with a 2-inch factory lift and is fitted with high-performance FOX aluminum monotube shocks to maximize handling and comfort.

Bronze wheels measure 17 by 7.5 inches and are beadlock capable with an optional black locking ring available through Mopar.

The leather-appointed interior includes bronze stitching. The leather seats with Rubicon 392 nomenclature keep drivers comfortable with performance-inspired, integrated upper bolsters to hold occupants in place. To accommodate new engine specs, the gauge cluster receives all-new numbering and design. Available on the Jeep Wrangler for the first time, the leather-wrapped, performance steering wheel features wheel-mounted paddle shifters for fast access to the eight-speed transmission and management of 470 lb.-ft. of torque.

The Uconnect system projects on a standard 8.4-inch screen. Loaded in the software, Jeep Off-road Pages allow owners to monitor pitch, roll, altitude, GPS coordinates, drivetrain power distribution and more.

The 2021 Jeep Wrangler Rubicon 392 is available in nine exterior colors: Black, Bright White, Firecracker Red, Granite Crystal Metallic, Punk ‘n Metallic, Sarge Green Metallic, Snazzberry Metallic, Sting-Gray Metallic and Billet Silver Metallic, all with a black interior.

The 2021 Jeep Wrangler Rubicon 392 includes 11 premium features, normally options on Jeep Wrangler:

  • Leather interior
  • Infotainment Group
  • HD electrical switch bank
  • Body-color hardtop
  • Body-color flares
  • Steel Bumper Group
  • LED Lighting Group
  • Cold Weather Group
  • Remote proximity entry
  • Safety Group
  • Advanced Safety Group