🏷️ Basic Information Identification Make: Isuzu Model: Trooper Year: 1990 Codes Chassis Code: UBS55 Vin Code: JS-UBS55 👋 Introduction Market Position Segment: Compact/Mid-size SUV, known for off-road capability and ruggedness Competitive Analysis Competitors: Jeep Cherokee XJ, Toyota 4Runner, Nissan Pathfinder, Mitsubishi Montero Key Features Durability: Renowned for its robust construction and off-road prowess Versatility: Suitable for daily driving, family transport, and serious off-roading Powertrain: Reliable Isuzu engines and strong four-wheel-drive systems 📋 Manual Details Coverage Areas Manual Type: Workshop Service Repair Manual Language: English Format: Downloadable Digital File (likely PDF) Page Count Estimated Pages: Hundreds (exact count not specified, but implies comprehensive coverage) 📖 Manual Coverage Systems Covered Engine: Detailed diagnostics, repair procedures, component overhaul, specifications for all engine variants Transmission: Service and repair of manual and automatic transmissions, including clutch, drivetrain components, and transfer case Brakes: Hydraulic system, ABS (if equipped), caliper and rotor service, brake line repair, bleeding procedures Electrical: Wiring diagrams, component testing, charging system, starting system, lighting, ignition system, instrumentation Suspension: Front and rear suspension components, alignment, shock absorber and spring replacement, steering linkage Chassis: Frame inspection, body mounting, exhaust system, fuel tank and lines, cooling system Bodywork: Body panel repair, door mechanisms, glass replacement, interior trim removal and installation HVAC: Heating, Ventilation, and Air Conditioning system diagnosis and repair, refrigerant handling (where applicable) Fuel System: Fuel injection system, fuel pump, injectors, fuel pressure testing Procedures Included Maintenance: Scheduled maintenance tasks, oil changes, filter replacements, fluid checks and changes, lubrication points Troubleshooting: Diagnostic charts, symptom-based troubleshooting guides, common fault finding Repair: Step-by-step instructions for component removal, installation, and repair Overhaul: Complete engine, transmission, and differential overhaul procedures Special Tools: Identification and use of specialized tools required for specific repair procedures Technical Depth Depth: Comprehensive, covering everything from basic maintenance to complete engine rebuilds and advanced diagnostics 📊 Manual Specifications File Format File Type: Digital Download (likely PDF) Print Quality Printability: High-resolution, suitable for printing individual pages or the entire manual Binding Type Binding: N/A (Digital format) Paper Type Paper Quality: N/A (Digital format) Searchability Text Search: Likely includes searchable text for quick information retrieval ⚙️ Engine Specifications Primary Engine Engine Type: Naturally Aspirated Inline 4-Cylinder Diesel, Naturally Aspirated Inline 4-Cylinder Gasoline, Naturally Aspirated V6 Gasoline Engine Displacement Gasoline 4Cyl: 2.6 L (2559 cc) Engine Code Gasoline 4Cyl: 4ZE1 Engine Displacement V6 Gasoline: 3.1 L (3165 cc) Engine Code V6 Gasoline: 6VD1 Engine Displacement Diesel: 2.8 L (2771 cc) Engine Code Diesel: 4JB1-T (Turbocharged) Performance Horsepower 2.6L: 120 hp @ 4800 rpm Torque 2.6L: 150 lb-ft @ 2600 rpm Horsepower 3.1Lv6: 165 hp @ 4600 rpm Torque 3.1Lv6: 185 lb-ft @ 3200 rpm Horsepower 2.8L Diesel: 96 hp @ 3800 rpm Torque 2.8L Diesel: 177 lb-ft @ 2300 rpm Fuel System Fuel Delivery Gasoline: Electronic Fuel Injection (EFI) Fuel Type: Unleaded Gasoline, Diesel 🔧 Transmission Standard Transmission Type Std: 5-Speed Manual Optional Transmission Type Opt: 4-Speed Automatic Features Drivetrain: Part-time 4WD with Electronic Auto-Hubs (most models) Transfer Case: 2-speed transfer case with 2WD High, 4WD High, 4WD Low, Neutral 📐 Dimensions Exterior Wheelbase: Approx. 104.7 inches (2659 mm) Length: Approx. 174.8 inches (4440 mm) Width: Approx. 66.5 inches (1689 mm) Height: Approx. 64.8 inches (1646 mm) Weights Curb Weight Std: Approx. 3500-3900 lbs (1588-1769 kg) depending on configuration Gross Vehicle Weight Rating Gvw: Approx. 4900-5300 lbs (2223-2404 kg) 🛡️ Safety Features Ratings NHTSA Rollover Resistance: Not consistently rated across all trims/years; typically considered average for its class at the time. Active Features ABS: Available (often on higher trims or as an option) Passive Features Seat Belts: 3-point front, 2-point rear (lap belts) in some configurations Airbags: Driver airbag typically standard for 1990 model year. 💡 Technology Features Infotainment Audio System: Factory AM/FM stereo with cassette player, optional CD player. Speakers in doors and rear. Dashboard Features: Analog gauges for speedometer, tachometer, fuel, coolant temperature, oil pressure. Warning lights. Driver Assistance Cruise Control: Available on some models Connectivity Usb Ports: N/A (Pre-dates widespread USB integration) 🔧 Maintenance Service Intervals Oil Change Interval: Every 3,000-5,000 miles or 3-6 months, depending on driving conditions. Refer to manual for exact specifications. Transmission Fluid Change: Every 30,000-60,000 miles for automatic, every 60,000 miles for manual. Check manual. Coolant Change: Every 2 years or 30,000 miles. Fluid Specifications Engine Oil Spec Gasoline: API SG or higher, SAE 10W-30 or 10W-40. Check manual for exact viscosity based on temperature. Engine Oil Spec Diesel: API CD or higher, SAE 15W-40. Check manual for exact viscosity. Automatic Transmission Fluid Atf: Dexron II or equivalent Manual Transmission Fluid: GL-4 Gear Oil (e.g., SAE 75W-90 or 80W-90). Check manual. Transfer Case Fluid: GL-4 Gear Oil (e.g., SAE 75W-90 or 80W-90). Check manual. Differential Fluid: GL-5 Gear Oil (e.g., SAE 80W-90). Check manual. Coolant: Ethylene Glycol based antifreeze/coolant, 50/50 mix with distilled water. Known Issues Engine Reliability: Generally reliable,...