🏷️ Basic Information Identification Make: Jeep Model: Grand Cherokee Generation: ZJ Model Year: 1998 Codes Platform Code: ZJ 👋 Introduction Market Position Positioning: The 1998 Jeep Grand Cherokee ZJ represented a mature iteration of Jeep's successful luxury SUV, offering a blend of capability and comfort that appealed to a broad audience. This manual serves enthusiasts and professional mechanics alike. Competitive Analysis Competitors: Competed with models like the Ford Explorer, Chevrolet Blazer, Toyota 4Runner, and Land Rover Discovery. The ZJ's unibody construction and sophisticated interior often set it apart. Key Features Vehicle Features: Available with robust V8 engines, advanced four-wheel-drive systems (Selec-Trac, Quadra-Trac), luxurious interiors, and a refined ride for its class. 📋 Manual Details Coverage Areas Primary Coverage: Complete service and repair for 1998 Jeep Grand Cherokee ZJ Page Count Estimated Page Count: 1500+ Manual Type Type: Factory Service Manual / Workshop Manual Language Language: English Format Format: Downloadable PDF 📖 Manual Coverage Systems Covered Engine Systems: Engine mechanical, fuel system, ignition system, cooling system, exhaust system, emissions control Transmission Systems: Automatic transmission (42RE, 44RE, 46RE), transfer case (NV242, NV249), driveline components Suspension Steering: Front and rear suspension, steering gear, power steering system, wheel alignment Brake Systems: Front and rear brakes (disc/drum configurations), anti-lock braking system (ABS), parking brake Electrical Systems: Battery, charging system, starting system, lighting system, instrument cluster, body electrical, power accessories, wiring diagrams HVAC System: Heating, ventilation, and air conditioning (HVAC) system diagnosis and repair Body Chassis: Body panels, interior trim, exterior trim, chassis components, frame, doors, windows, seats Procedures Included Maintenance Procedures: Scheduled maintenance, oil changes, filter replacements, fluid checks and changes, tune-ups Repair Procedures: Component removal, installation, overhaul, and adjustment for all major systems Troubleshooting: Diagnostic procedures, fault code interpretation, step-by-step troubleshooting guides for common and complex issues Diagnostics: On-Board Diagnostics (OBD-II) system, diagnostic trouble codes (DTCs), scan tool usage, sensor testing Technical Depth Depth: Comprehensive, covering everything from basic maintenance to complete engine and transmission rebuilds, including electrical schematics and torque specifications. 📊 Manual Specifications File Format File Format: PDF Print Quality Quality: High-resolution, printable pages with clear diagrams and text. Binding Type Binding: N/A (Digital Download) Paper Type Type: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Options: 4.0L Inline-6 (242 ci) 'PowerTech' I-6, 4.0L V8 (242 ci) 'Magnum' V8, 5.2L V8 (318 ci) 'Magnum' V8, 5.9L V8 (360 ci) 'Magnum' V8 Performance 4.0L I6 Hp: 185 hp @ 4700 rpm 4.0L I6 Torque: 220 lb-ft @ 3000 rpm 5.2L V8 Hp: 220 hp @ 4400 rpm 5.2L V8 Torque: 285 lb-ft @ 3200 rpm 5.9L V8 Hp: 245 hp @ 4800 rpm 5.9L V8 Torque: 345 lb-ft @ 3200 rpm Fuel System Fuel Delivery: Multi-point fuel injection (MPI) for all engines Fuel Type: Unleaded gasoline Engine Codes 4.0L I6 Code: 242 5.2L V8 Code: 318 5.9L V8 Code: 360 🔧 Transmission Standard Standard Transmission: 4-speed automatic (42RE with 4.0L I6, 44RE with 5.2L V8, 46RE with 5.9L V8) Optional Optional Transmission: N/A for 1998 model year Features Transfer Case Options: NV242 Selec-Trac (part-time and full-time 4WD), NV249 Quadra-Trac (full-time 4WD with viscous coupling) Fluid Specifications Automatic Transmission Fluid: ATF+4 (Chrysler Mopar Material Standard MS-9224) is recommended for later models, but ATF+3 (MS-9222) was common. Manual specifies correct fluid type. 📐 Dimensions Exterior Wheelbase: 107.1 inches (2720 mm) Length: 178.5 inches (4534 mm) Width: 70.5 inches (1791 mm) Height: 63.0 inches (1600 mm) Weights Curb Weight Min: 3,880 lbs (1759 kg) Curb Weight Max: 4,370 lbs (1982 kg) 🛡️ Safety Features Ratings NHTSA Frontal Impact Driver: 4/5 Stars NHTSA Frontal Impact Passenger: 4/5 Stars IIHS Frontal Offset: Good (for its time) Active Features ABS: Standard on all models Passive Features Airbags: Driver and passenger front airbags Seatbelts: 3-point front and rear seatbelts 💡 Technology Features Infotainment Audio System Options: Factory premium audio systems with cassette, CD player (optional), and multiple speakers. Various aftermarket head units can be installed. Driver Assistance Cruise Control: Standard on most trims ABS: Standard Connectivity Connectivity Features: Limited by era; typically includes power windows, power locks, power seats (optional). 🔧 Maintenance Service Intervals Oil Change Interval: Every 3,000-7,500 miles (5,000-12,000 km) or 6 months, depending on driving conditions and oil type used (refer to manual for specifics). Transmission Fluid Change: Every 30,000-60,000 miles (48,000-97,000 km) or 2-3 years. Crucial for longevity. Coolant Change: Every 30,000 miles (48,000 km) or 2 years. Spark Plug Replacement: Approximately 100,000 miles (160,000 km) for platinum-tipped plugs (refer to manual for exact type and interval). Fluid Specifications Engine Oil Spec: API certified SAE 10W-30 for 4.0L I6, SAE 5W-30 or 10W-30 for V8 engines. Consult manual for specific viscosity based on climate. Coolant Type: Ethylene glycol based coolant, typically Mopar Antifreeze/Coolant (MS-7170). Brake Fluid Spec: DOT 3 Known Issues Common Problem 1: Head gasket leaks (especially on 4.0L I6, though less common on...