The Jeep Wrangler JL Rubicon 3.6 Pentastar V6 4×4, produced from November 2017 through April 2023, represents the fourth generation of the iconic Wrangler. Positioned as a top-tier trim within the JL lineup, the Rubicon is renowned for its exceptional off-road capability. It builds upon the foundation of the JL platform (shared with the Gladiator pickup) and distinguishes itself with specialized hardware and software geared towards tackling challenging terrain. This variant, equipped with the 3.6-liter Pentastar V6 engine, served as a cornerstone of the Wrangler’s appeal in the North American market, offering a balance of power, reliability, and the legendary Jeep experience.
Technical Specifications
| Brand | Jeep |
| Model | Wrangler |
| Generation | Wrangler IV (JL) |
| Type (Engine) | Rubicon 3.6 Pentastar V6 (285 Hp) 4×4 |
| Start of production | November, 2017 |
| End of production | April, 2023 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Off-road vehicle |
| Seats | 4 |
| Doors | 2 |
| Fuel consumption (economy) – urban (EPA) | 13.8 l/100 km (17 US mpg, 20.5 UK mpg, 7.2 km/l) |
| Fuel consumption (economy) – extra urban (EPA) | 9.4 l/100 km (25 US mpg, 30.1 UK mpg, 10.6 km/l) |
| Fuel consumption (economy) – combined (EPA) | 11.8 l/100 km (19.9 US mpg, 23.9 UK mpg, 8.5 km/l) |
| Fuel Type | Petrol (Gasoline) |
| Weight-to-power ratio | 6.7 kg/Hp, 148.8 Hp/tonne |
| Weight-to-torque ratio | 5.4 kg/Nm, 184.3 Nm/tonne |
| Power | 285 Hp @ 6400 rpm |
| Power per litre | 79.1 Hp/l |
| Torque | 353 Nm @ 4800 rpm (260.36 lb.-ft. @ 4800 rpm) |
| Maximum engine speed | 6600 rpm |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | Pentastar / ERC |
| Engine displacement | 3604 cm3 (219.93 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | V-engine |
| Cylinder Bore | 96 mm (3.78 in.) |
| Piston Stroke | 83 mm (3.27 in.) |
| Compression ratio | 11.3:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | DOHC |
| Engine oil capacity | 4.73 l (5 US qt | 4.16 UK qt) |
| Coolant | 10.1 l (10.67 US qt | 8.89 UK qt) |
| Kerb Weight | 1915 kg (4221.85 lbs.) |
| Trunk (boot) space – minimum | 203 l (7.17 cu. ft.) |
| Trunk (boot) space – maximum | 508 l (17.94 cu. ft.) |
| Fuel tank capacity | 66 l (17.44 US gal | 14.52 UK gal) |
| Permitted trailer load with brakes (12%) | 907 kg (1999.59 lbs.) |
| Length | 4237 mm (166.81 in.) |
| Width | 1875 mm (73.82 in.) |
| Height | 1868 mm (73.54 in.) |
| Wheelbase | 2460 mm (96.85 in.) |
| Front track | 1598 mm (62.91 in.) |
| Rear (Back) track | 1598 mm (62.91 in.) |
| Front overhang | 742 mm (29.21 in.) |
| Rear overhang | 1036 mm (40.79 in.) |
| Ride height (ground clearance) | 274 mm (10.79 in.) |
| Minimum turning circle (turning diameter) | 10.5 m (34.45 ft.) |
| Approach angle | 44° |
| Departure angle | 37° |
| Ramp-over (brakeover) angle | 27.8° |
| Drivetrain Architecture | The Internal combustion engine (ICE) drives the rear wheels permanently, and the front wheels are driven through an electrically or mechanically operated clutch if necessary. |
| Drive wheel | All wheel drive (4×4) |
| Number of gears and type of gearbox | 6 gears, manual transmission |
| Front suspension | Coil spring, Rigid axle suspension, Transverse stabilizer |
| Rear suspension | Rigid axle suspension, Transverse stabilizer, Coil spring |
| Front brakes | Ventilated discs, 330×28 mm |
| Rear brakes | Disc, 342×12 mm |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Cone worm with recirculation balls |
| Power steering | Electric Steering |
| Tires size | 285/70 R17 |
| Wheel rims size | 7.5J x 17 |
INTRODUCTION
The Jeep Wrangler JL Rubicon 3.6 Pentastar V6 4×4, launched in late 2017, marked a significant evolution for the Wrangler lineage. The JL generation represented the first complete redesign of the Wrangler since 2007, incorporating modern technology and improved on-road refinement while retaining the core off-road DNA that defines the brand. The Rubicon trim, historically the most capable Wrangler variant, continued this tradition, offering features specifically designed for extreme off-roading. It occupied the premium end of the JL spectrum, appealing to enthusiasts who prioritized performance over fuel efficiency or luxury.
Powertrain & Engine Architecture
At the heart of the JL Rubicon is the 3.6-liter “Pentastar” V6 engine, designated as the ERC engine code. This engine is a naturally aspirated, 60-degree V6 featuring a dual overhead camshaft (DOHC) valvetrain with four valves per cylinder. It utilizes a multi-port fuel injection system for precise fuel delivery. The Pentastar engine is known for its robust construction and relatively simple design, contributing to its reliability. The 3.6L produces 285 horsepower at 6,400 rpm and 260 lb-ft of torque at 4,800 rpm. The engine’s architecture prioritizes low-end torque for off-road crawling, making it well-suited to the Wrangler’s intended purpose. The standard transmission for this variant was a six-speed manual, though an eight-speed automatic transmission was also available. The automatic transmission offered smoother shifts and enhanced fuel economy, but some purists preferred the control of the manual.
Driving Characteristics
The JL Rubicon 3.6L with the manual transmission delivers a raw and engaging driving experience. Acceleration is adequate, but not particularly brisk, with a 0-60 mph time estimated around 7.5 seconds. The engine’s torque curve provides sufficient power for everyday driving and tackling moderate inclines. The automatic transmission, while improving drivability, slightly diminishes the sense of connection to the engine. The Rubicon’s true strength lies in its off-road prowess. Features like the Rock-Trac 4×4 system with a 4:1 low-range gear ratio, electronic locking front and rear differentials, and disconnecting front sway bar provide exceptional traction and articulation. These features allow the Rubicon to navigate extremely challenging terrain with relative ease. The relatively high center of gravity and solid axles contribute to a somewhat bumpy ride on paved roads, but this is a trade-off for its off-road capabilities.
Equipment & Trim Levels
The Rubicon trim came standard with a comprehensive suite of off-road equipment, including heavy-duty Dana 44 axles, rock rails, and BFGoodrich Mud-Terrain tires. Interior features included cloth upholstery, a Uconnect infotainment system with a 7-inch touchscreen, and air conditioning. Optional extras included leather upholstery, a premium audio system, a navigation system, and various convenience packages. The Rubicon also offered a range of Mopar accessories, allowing owners to further customize their vehicles for specific off-road activities. The interior, while functional, prioritized durability over luxury, reflecting the Wrangler’s utilitarian nature.
Chassis & Braking
The JL Rubicon utilizes a body-on-frame construction, providing a robust and durable chassis. The front suspension features a solid axle with coil springs and a transverse stabilizer bar, while the rear suspension also employs a solid axle with coil springs and a stabilizer bar. This suspension setup is designed to maximize wheel articulation and off-road performance. The braking system consists of ventilated discs at the front and discs at the rear, providing adequate stopping power for the vehicle’s weight. An Anti-lock Braking System (ABS) is standard.
Market Reception & Comparison
The JL Rubicon 3.6L was widely praised by automotive critics for its exceptional off-road capability and improved on-road refinement compared to previous generations. However, its fuel economy was often criticized as being relatively poor, averaging around 19.9 US mpg in combined driving. Compared to the base Wrangler Sport model, the Rubicon offered significantly enhanced off-road performance but came at a higher price point. The Sahara trim offered a more comfortable and luxurious experience, but lacked the Rubicon’s specialized off-road hardware. The 2.0L turbocharged four-cylinder engine, also available in the JL, offered slightly better fuel economy but lacked the Pentastar V6’s overall power and refinement.
Legacy
The JL Rubicon 3.6 Pentastar V6 4×4 has established itself as a highly sought-after vehicle in the used car market. The Pentastar V6 engine has proven to be remarkably reliable, with many examples exceeding 150,000 miles with proper maintenance. The JL generation, in general, represents a significant step forward in terms of build quality and refinement, making it a more practical daily driver than previous Wranglers. The Rubicon trim, in particular, continues to hold its value due to its iconic status and exceptional off-road capabilities. Its enduring popularity is a testament to its ability to deliver the authentic Jeep experience while offering a degree of modern comfort and convenience.
