Jeep Jeep Grand Cherokee (Wj)

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Jeep Grand Cherokee (WJ): A Comprehensive Buyer's Guide

The Jeep Grand Cherokee (WJ) represents the second generation of Jeep's popular mid-size SUV. Produced from 1999 to 2004, it aimed to refine the formula of its predecessor (ZJ), offering a blend of off-road capability, on-road comfort, and a touch of luxury. The WJ is a popular choice for those looking for a capable and relatively affordable SUV, but understanding its strengths and weaknesses is crucial before making a purchase.

Generations

First Generation (ZJ): 1993-1998

While technically outside the scope of this guide, it's important to acknowledge the ZJ as the predecessor. The ZJ introduced the Grand Cherokee nameplate and established its core values. It was criticized for its sometimes-dated interior and rust vulnerabilities, issues addressed in the WJ generation.

Second Generation (WJ): 1999-2004

• Key Changes: The WJ was a significant redesign compared to the ZJ. It featured a completely new body, more modern interior, and an updated engine lineup. The Quadra-Drive four-wheel-drive system was a notable improvement, offering enhanced off-road traction. Significant improvements were also made to the chassis and suspension for better on-road handling and ride quality.
• Engines: Offered a 4.0L inline-six, a 4.7L V8 (initially producing 235 hp, later upgraded), and a rare 5.9L V8 (limited to the 1998 ZJ but sometimes confusingly mentioned). The 4.7L V8 was the most popular choice, balancing power and fuel economy.
• Transmissions: Primarily used a 4-speed automatic transmission.
• Trims: Available in Laredo, Limited, and Overland trims, each offering increasing levels of features and luxury.
• 2002 Facelift: The 2002 model year brought a mid-cycle refresh with revised headlights, grille, and interior trim. Power output for the 4.7L V8 was also increased.

Reliability & Common Issues

The WJ, while generally reliable, is not without its common problems. Addressing these issues proactively can save you money and headaches in the long run.

Engine Issues:

• 4.7L V8 Valve Train Problems: The 4.7L V8 is prone to valve train issues, including valve seat recession. This can lead to compression loss and engine misfires. Regular oil changes with the correct weight oil are crucial. Listen for ticking noises, especially at startup.
• 4.7L V8 Sludge Buildup: Poor maintenance or infrequent oil changes can cause sludge buildup in the 4.7L V8, leading to oil starvation and engine damage. Check the oil condition and consider a pre-purchase inspection by a mechanic.
• Cooling System: The cooling system, particularly the radiator and water pump, is a known weak point. Overheating can lead to serious engine damage. Inspect for leaks and consider replacing these components as preventative maintenance.
• Crankshaft Position Sensor: Crankshaft position sensor failures are common, causing stalling and difficulty starting.
• 4.0L Inline-Six Oil Leaks: The 4.0L is a robust engine but prone to oil leaks from the valve cover and rear main seal. These leaks are often minor but should be addressed to prevent further issues.

Transmission & Drivetrain:

• 45RFE Transmission (4.7L V8): The 45RFE transmission can experience issues, particularly with the overdrive and torque converter. Erratic shifting or slipping are warning signs.
• Differentials: Check for leaks and unusual noises from the differentials. The Quadra-Drive system, while capable, requires regular maintenance of the differentials, including the Vari-Lok axles. Failure to do so can lead to costly repairs.
• Transfer Case: Inspect the transfer case for leaks and smooth operation. Ensure the 4WD system engages and disengages properly.
• U-Joints: Check all U-joints for play and signs of wear.

Electrical:

• Blend Door Actuators: The blend door actuators, which control the flow of hot and cold air, are notorious for failing, resulting in inconsistent climate control. A clicking noise behind the dashboard is a common symptom.
• Window Regulators: Power window regulators can fail, causing the windows to get stuck.
• Door Lock Actuators: Similar to the blend door actuators, door lock actuators can also fail.

Body & Interior:

• Rust: Check for rust, particularly around the rocker panels, wheel wells, and floor pans. While the WJ is less prone to rust than the ZJ, it's still a concern, especially in areas with harsh winters.
• Interior Wear: The interior materials can show their age, particularly the leather seats and plastic trim. Check for cracks, tears, and excessive wear.
• Headliner Sagging: The headliner can sag, especially in hotter climates.

Driving Experience

The WJ offers a good balance of on-road comfort and off-road capability, making it a versatile SUV. However, it's important to understand its strengths and weaknesses in different driving scenarios.

Pros:

• Off-Road Capability: With the Quadra-Drive system, the WJ is a very capable off-roader, able to tackle challenging terrain.
• Comfortable Ride: The WJ provides a comfortable ride on paved roads, especially compared to some other off-road-focused SUVs.
• Spacious Interior: The interior is relatively spacious, offering comfortable seating for five passengers and ample cargo room.
• Powerful Engines: The 4.7L V8 provides adequate power for most driving situations, while the 4.0L offers a more economical option.

Cons:

• Fuel Economy: Fuel economy is not a strong point, especially with the V8 engines.
• Handling: While improved over the ZJ, the WJ's handling is not as precise as some modern SUVs. Body roll can be noticeable in corners.
• Reliability Issues: As mentioned earlier, the WJ is prone to certain reliability issues that can be costly to repair.
• Dated Technology: The WJ lacks the advanced technology features found in newer SUVs.

Buying Advice

Purchasing a WJ Grand Cherokee requires careful consideration. Here's some advice to help you make an informed decision:

What Years to Look For:

• 2002-2004 Models: The 2002-2004 models benefit from the mid-cycle refresh, which included improved engine performance and updated styling.
• Well-Maintained Examples: Regardless of the year, prioritize finding a WJ that has been well-maintained with regular oil changes and preventative maintenance.

What to Avoid:

• Neglected Vehicles: Avoid WJs that show signs of neglect, such as excessive rust, deferred maintenance, or a poorly running engine.
• High Mileage Examples: While high mileage isn't necessarily a deal-breaker, be prepared for potential repairs and maintenance needs.

Pre-Purchase Inspection:

• Professional Inspection: A pre-purchase inspection by a qualified mechanic is highly recommended. They can identify potential problems that you might miss.
• Check Engine Light: Ensure the check engine light is not illuminated. If it is, have the codes read to identify the underlying issue.
• Test Drive: Take the WJ for an extended test drive to assess its performance in various driving conditions. Pay attention to the engine, transmission, and suspension.
• Fluid Checks: Check the fluid levels and condition of the engine oil, transmission fluid, coolant, and power steering fluid.
• Rust Inspection: Thoroughly inspect the undercarriage and body for rust.

Specific Recommendations:

• 4.7L V8 with Service Records: If you want more power, look for a 4.7L V8 model with documented service records, especially regarding oil changes.
• Laredo Trim: The Laredo trim offers a good balance of features and affordability.
• Consider a 4x4 Model: Unless you live in an area with mild winters and no off-road opportunities, opt for a 4x4 model for added versatility.

The Jeep Grand Cherokee (WJ) can be a rewarding purchase for those looking for a capable and relatively affordable SUV. By understanding its strengths and weaknesses and conducting a thorough inspection before buying, you can increase your chances of finding a reliable and enjoyable vehicle.

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