🏷️ Basic Information Identification Make: Jeep Model: Wrangler Year: 2004 Chassis Code: TJ Codes Engine Codes Covered: 3.7L (226ci) V6 - ERB, 4.0L (242ci) Inline-6 - ERH 👋 Introduction Market Position Segment: Compact / Off-Road SUV Target Audience: Enthusiasts, off-roaders, owners seeking detailed maintenance and repair knowledge. Competitive Analysis Key Competitors 2004: Toyota Tacoma (4x4 variants), Nissan Xterra, Ford Bronco (prior generations), Suzuki Vitara. Key Features Vehicle Design Philosophy: Body-on-frame construction, solid front and rear axles, removable tops (soft/hard), robust off-road capability. Key Features Manual Value Proposition: Empowers owners to perform complex maintenance and repairs, saving on labor costs and extending vehicle lifespan. Scope: Provides the same level of detail as the official dealership service manuals. 📋 Manual Details Coverage Areas Primary Coverage: North America Engine Coverage: 3.7L V6, 4.0L Inline-6 Transmission Coverage: NV3550 (5-Speed Manual), NV241OR (Command-Trac 4WD Transfer Case), 42RLE (4-Speed Automatic) Drivetrain Coverage: Dana 30 front axle, Dana 35 rear axle (standard, optional Dana 44 rear) Page Count Estimated Pages: Approximately 1500-2000 pages (typical for comprehensive factory-level manuals) Manual Type Type: Factory Service Manual / Workshop Manual Additional Type: Includes Maintenance Schedule & Troubleshooting Guide Language Primary Language: English Format Digital Format: PDF Searchable: Yes, text-searchable PDF 📖 Manual Coverage Systems Covered Powertrain: Engine mechanical, fuel and exhaust systems, ignition system, cooling system, lubrication system, starting and charging system, engine control systems (PCM). Drivetrain: Clutch system, manual transmission (NV3550), automatic transmission (42RLE), transfer case (NV241OR), driveshafts, front axle (Dana 30), rear axle (Dana 35/44). Suspension Steering: Front and rear suspension (leaf springs), shock absorbers, steering system (power steering pump, steering gear), wheel alignment specifications. Brakes: Front and rear brake systems (disc brakes all around), anti-lock braking system (ABS) if equipped, parking brake system, brake fluid specifications. Electrical: Battery, charging system, starting system, lighting system, instrument cluster, body electrical systems, wiring diagrams, fuses, relays, powertrain control module (PCM), anti-theft system. Body: Body construction, exterior trim, doors, windows, seats, interior trim, HVAC system (heating, ventilation, air conditioning), body sealant and vibration damping. Procedures Included Maintenance: Scheduled maintenance intervals, oil changes, filter replacements, fluid checks and top-offs, lubrication, tire rotation, inspection points. Troubleshooting: Diagnostic procedures for common problems, symptom-based troubleshooting charts, electrical diagnostic procedures, diagnostic trouble codes (DTCs) interpretation. Repair: Step-by-step repair instructions for all major components and systems, disassembly and reassembly procedures, torque specifications, specifications and tolerances. Diagnostics: OBD-II diagnostics, scan tool usage, component testing, electrical circuit testing, pressure testing. Technical Depth Depth: Comprehensive factory-level repair and diagnostic information, suitable for professional technicians and advanced DIY enthusiasts. Detail Level: Includes detailed schematics, exploded views, component locations, specifications, and procedures for complete overhauls. 📊 Manual Specifications File Format Type: Digital (PDF) Quality: High-resolution scans, clear text and diagrams Print Quality Readability: Designed for clear on-screen viewing and printable pages Binding Type Digital Format Consideration: N/A (Digital product) Paper Type Digital Format Consideration: N/A (Digital product) ⚙️ Engine Specifications Primary Engine Base Engine: 4.0L (242ci) Inline-6 (ERH) Optional Engine: 3.7L (226ci) V6 (ERB) Performance 4.0L Horsepower: 190 hp @ 4600 rpm 4.0L Torque: 235 lb-ft @ 3200 rpm 3.7L Horsepower: 205 hp @ 5200 rpm 3.7L Torque: 235 lb-ft @ 4000 rpm Fuel System Type: Multi-port Electronic Fuel Injection (MPI) Fuel Type: Unleaded gasoline, 87 octane recommended Engine Management ECU Type: Chrysler's NGC (Next Generation Controller) or similar variants for engine control. 🔧 Transmission Standard Type: NV3550 5-Speed Manual Transmission Optional Type: 42RLE 4-Speed Automatic Transmission Features Transfer Case: NV241OR (Command-Trac 2-speed part-time 4WD system) Fluid Specifications Manual Transmission Fluid: Mopar Manual Transmission Lubricant (MS-9224) or equivalent API GL-4 SAE 75W-90 Automatic Transmission Fluid: Mopar ATF+4 (MS-9602) or equivalent Transfer Case Fluid: Mopar NV241OR Transfer Case Lubricant (MS-9009) or equivalent SAE 75W-80 GL-4 📐 Dimensions Exterior Wheelbase: 93.4 inches (2372 mm) Length: 159.3 inches (4046 mm) Width: 73.1 inches (1857 mm) Height: 72.1 inches (1831 mm) (soft top) Ground Clearance: Approx. 8.5 inches (216 mm) depending on tire size Weights Curb Weight: Approx. 3500-3700 lbs (1588-1678 kg) depending on configuration Towing Capacity: 2000 lbs (907 kg) Payload Capacity: Approx. 800-850 lbs (363-386 kg) 🛡️ Safety Features Ratings NHTSA Rollover Resistance: 3/5 stars IIHS Frontal Offset: Good Active Features ABS: Optional Anti-lock Braking System (ABS) for rear wheels Passive Features Airbags: Driver and passenger front airbags Rollover Protection: Factory-installed sport bar/roll cage 💡 Technology Features Infotainment Audio System: Factory AM/FM/CD player, optional Infinity speaker system, SiriusXM Satellite Radio preparation. Driver Assistance Features: Limited driver assistance systems by modern standards; primary focus on mechanical systems. Connectivity Features: Basic connectivity, no integrated Bluetooth or smartphone mirroring. 🔧 Maintenance Service Intervals Oil Change: Every 3,000-5,000 miles (4,800-8,000 km) or 3-6 months, depending on driving conditions. Air Filter Replacement: Every 15,000-30,000 miles (24,000-48,000 km) Spark Plug Replacement: Approx. 100,000 miles (160,000 km) for iridium plugs (if equipped). Coolant Flush: Every 30,000-60,000 miles (48,000-96,000 km) or 2-5...