The Jeep Grand Cherokee II (WJ), produced from 1998 to 2003, represented a significant step forward for Jeep’s flagship SUV. The 4.0-liter inline-six engine paired with an automatic transmission was a popular configuration, offering a balance of capability and affordability within the WJ lineup. This variant served as a mainstay for buyers prioritizing a comfortable ride and proven reliability over outright performance, positioning itself as a mid-range option between the base 4.0L manual and the more powerful 4.7L V8 models. It was a key player in the American SUV market, appealing to families and individuals seeking a versatile vehicle for both daily driving and light off-road adventures.
Technical Specifications
| Brand | Jeep |
| Model | Grand Cherokee |
| Generation | Grand Cherokee II (WJ) |
| Type (Engine) | 4.0 (195 Hp) Automatic |
| Start of production | 1998 |
| End of production | 2003 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | SUV |
| Seats | 5 |
| Doors | 5 |
| 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) | 10.7 l/100 km (22 US mpg, 26.4 UK mpg, 9.3 km/l) |
| Fuel consumption (economy) – combined (EPA) | 12.4 l/100 km (19 US mpg, 22.8 UK mpg, 8.1 km/l) |
| Fuel Type | Petrol (Gasoline) |
| Weight-to-power ratio | 8.8 kg/Hp, 113.6 Hp/tonne |
| Weight-to-torque ratio | 5.5 kg/Nm, 181.8 Nm/tonne |
| Power | 195 Hp @ 4600 rpm |
| Power per litre | 49.3 Hp/l |
| Torque | 312 Nm @ 3000 rpm (230.12 lb.-ft. @ 3000 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | ERH |
| Engine displacement | 3956 cm3 (241.41 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | Inline |
| Cylinder Bore | 98.4 mm (3.87 in.) |
| Piston Stroke | 86.7 mm (3.41 in.) |
| Compression ratio | 8.7:1 |
| Number of valves per cylinder | 2 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | OHV |
| Engine oil capacity | 5.7 l (6.02 US qt | 5.02 UK qt) |
| Coolant | 14.1 l (14.9 US qt | 12.41 UK qt) |
| Kerb Weight | 1716 kg (3783.13 lbs.) |
| Max. weight | 2336 kg (5150 lbs.) |
| Max load | 620 kg (1366.87 lbs.) |
| Trunk (boot) space – minimum | 1104 l (38.99 cu. ft.) |
| Trunk (boot) space – maximum | 2047 l (72.29 cu. ft.) |
| Fuel tank capacity | 78 l (20.61 US gal | 17.16 UK gal) |
| Max. roof load | 68 kg (149.91 lbs.) |
| Permitted trailer load with brakes (12%) | 2268 kg (5000.08 lbs.) |
| Length | 4610 mm (181.5 in.) |
| Width | 1836 mm (72.28 in.) |
| Height | 1786 mm (70.31 in.) |
| Wheelbase | 2690 mm (105.91 in.) |
| Front track | 1511 mm (59.49 in.) |
| Rear (Back) track | 1511 mm (59.49 in.) |
| Front overhang | 815 mm (32.09 in.) |
| Rear overhang | 1105 mm (43.5 in.) |
| Ride height (ground clearance) | 221 mm (8.7 in.) |
| Drag coefficient (Cd) | 0.45 |
| Minimum turning circle (turning diameter) | 11.4 m (37.4 ft.) |
| Approach angle | 36.7° |
| Departure angle | 28.6° |
| Ramp-over (brakeover) angle | 22.6° |
| Drivetrain Architecture | The Internal combustion engine (ICE) drives the rear wheels of the vehicle. |
| Drive wheel | Rear wheel drive |
| Number of gears and type of gearbox | 4 gears, automatic transmission |
| Front suspension | Coil spring, Rigid axle suspension, Transverse stabilizer |
| Rear suspension | Rigid axle suspension, Transverse stabilizer, Trailing arm, Coil spring |
| Front brakes | Ventilated discs, 305 mm |
| Rear brakes | Disc, 305 mm |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Cone worm with recirculation balls |
| Power steering | Hydraulic Steering |
| Tires size | 225/75 R16 |
| Wheel rims size | 7J x 16 |
Powertrain & Engine Architecture
The heart of this Grand Cherokee variant is the 4.0-liter (3956 cc) inline-six cylinder engine, designated the ERH code. This engine, a descendant of the AMC 242 cubic inch inline-six, was known for its durability and relatively simple design. It featured a cast iron block and aluminum cylinder head, utilizing a single overhead valve (OHV) valvetrain with two valves per cylinder. Fuel delivery was managed by a multi-port fuel injection system, providing a balance between efficiency and performance. The engine produced 195 horsepower at 4600 rpm and 230 lb-ft of torque at 3000 rpm. The 42RE four-speed automatic transmission was the standard pairing, chosen for its reliability and suitability for towing. This transmission featured electronic control for smoother shifting and improved fuel economy compared to earlier iterations.
Driving Characteristics
The 4.0L automatic Grand Cherokee offered a comfortable and predictable driving experience. While not particularly quick, the engine provided adequate power for everyday driving and highway cruising. The automatic transmission, while not offering the most responsive shifts, contributed to a relaxed driving style. The 42RE transmission’s gear ratios were optimized for torque delivery, making it suitable for towing and off-road situations. Compared to the 4.7L V8, the 4.0L felt less powerful, especially during acceleration and uphill climbs. However, the 4.0L offered better fuel economy and a smoother, quieter ride. The manual transmission versions of the 4.0L provided a more engaging driving experience, but the automatic was favored by many buyers for its convenience.
Equipment & Trim Levels
The 4.0L automatic Grand Cherokee typically came standard with features like air conditioning, power windows and locks, cruise control, and an AM/FM stereo. Higher trim levels, such as the Limited, added features like leather upholstery, heated seats, a premium sound system, and alloy wheels. Optional extras included a sunroof, upgraded audio systems, and a rear entertainment system. Interior upholstery was typically cloth on base models, with leather available on higher trims. The dashboard layout was functional and straightforward, with easy-to-read gauges and intuitive controls.
Chassis & Braking
The WJ Grand Cherokee utilized a body-on-frame construction, providing a robust and durable platform. The front suspension featured coil springs and a rigid axle with a transverse stabilizer bar, while the rear suspension also employed a rigid axle with coil springs and a stabilizer bar. This setup provided a comfortable ride and good off-road capability. Braking duties were handled by ventilated discs at the front and solid discs at the rear. Anti-lock brakes (ABS) were standard, enhancing safety and control during emergency braking situations. The relatively heavy weight of the vehicle (1716 kg / 3783.13 lbs) contributed to its stable handling characteristics.
Market Reception & Comparison
The 4.0L automatic Grand Cherokee was well-received by consumers seeking a capable and reliable SUV. Critics praised its comfortable ride, spacious interior, and proven powertrain. However, some noted its relatively slow acceleration and dated interior design compared to newer competitors. Fuel economy was considered average for its class. Compared to the 4.7L V8, the 4.0L offered better fuel efficiency and a lower purchase price, making it a more attractive option for budget-conscious buyers. The 4.0L manual transmission provided better performance and fuel economy, but the automatic was more popular due to its convenience.
Legacy
The 4.0L inline-six engine in the WJ Grand Cherokee is known for its longevity and reliability. With proper maintenance, these engines can easily exceed 200,000 miles. The 42RE automatic transmission is also generally reliable, although it can be prone to issues if not properly serviced. Today, the WJ Grand Cherokee 4.0L automatic remains a popular choice in the used car market, particularly for those seeking a capable and affordable SUV. Its simple design and readily available parts make it relatively easy to maintain and repair. While it may not offer the latest technology or features, its proven reliability and comfortable ride continue to appeal to a wide range of buyers.
