🏷️ Basic Information Identification Make: Dodge Model: Ram AD150 Truck Generation: Second Generation (Second Facelift) Codes Chassis Codes: AD 👋 Introduction Market Position Vehicle Segment: Full-size Pickup Truck Target Audience: Truck owners, DIY mechanics, professional repair shops. Competitive Analysis Key Competitors: Ford F-Series, Chevrolet C/K Series, GMC Sierra. Key Features Vehicle Reputation: Known for its ruggedness and utility. Manual Value Proposition: Provides essential repair and maintenance information for a critical period of the Dodge Ram's history, enabling owners to maintain or repair their vehicles effectively. 📋 Manual Details Coverage Areas Model Years: 1989, 1990, 1991 Trim Levels: All Engine Options: All gasoline and diesel engines offered Page Count Total Pages: 1613 Manual Type Type: Workshop Service and Repair Manual Language Language: English Format Format: PDF (Portable Document Format) 📖 Manual Coverage Systems Covered Engine Mechanical: Engine overhaul, disassembly, assembly, inspection, specifications, torque values, timing, internal components (pistons, rings, crankshaft, camshaft, valves), cylinder heads, blocks, oil pump, water pump. Engine Performance: Engine tuning, diagnostics, performance adjustments, emission control systems. Fuel System: Fuel injection (MPI/TBI), fuel pumps, fuel filters, fuel injectors, fuel lines, fuel pressure testing, carburetor (if applicable to specific models). Ignition System: Spark plugs, ignition coils, distributor (if applicable), ignition timing, electronic ignition control modules. Cooling System: Radiator, cooling fans, thermostat, water pump, coolant hoses, coolant types and capacities, pressure testing. Exhaust System: Exhaust manifolds, catalytic converter, mufflers, exhaust pipes, gaskets, emissions control components. Transmission Automatic: Removal, installation, overhaul, diagnosis, fluid types, torque converter, valve body, internal components, shift linkage adjustment. Transmission Manual: Removal, installation, overhaul, diagnosis, clutch system, transmission fluid, internal gears and bearings. Driveline: Drive shafts, U-joints, propeller shafts, differentials (front and rear), axle housings, axle shafts, gear ratios. Suspension Front: Independent suspension components, ball joints, control arms, coil springs, shock absorbers, sway bar, steering knuckles, alignment specifications. Suspension Rear: Leaf springs, shock absorbers, axle location, control arms (if applicable), alignment specifications. Steering System: Steering gear, power steering pump, steering linkage, tie rods, steering column, steering wheel removal/installation, hydraulic fluid specifications. Brake System: Disc brakes (front and rear), drum brakes (rear), brake calipers, brake pads, brake rotors, brake shoes, brake drums, master cylinder, brake lines, brake fluid types and specifications, parking brake system, ABS (if equipped). Wheels And Tires: Tire pressure specifications, wheel lug nut torque, wheel bearing replacement, wheel alignment. Electrical System: Battery, alternator, starter motor, wiring diagrams, fuse box locations and diagrams, relays, lighting system (headlights, taillights, interior lights), ignition switch. Instrumentation And Controls: Dashboard gauges, warning lights, switches, indicators, climate control system operation and diagnosis. Body And Frame: Body panel removal and installation, door repair, window mechanisms, interior trim, chassis components, frame inspection and repair, rust prevention. HVAC System: Air conditioning system diagnosis, refrigerant types and capacities, compressor, condenser, evaporator, heater core, blower motor, climate control modules. Emission Control: EGR system, PCV system, oxygen sensors, catalytic converter function, evaporative emission control system (EVAP). Procedures Included Routine Maintenance: Oil and filter changes, fluid level checks and top-offs, tire rotations, brake inspections, spark plug replacement, air filter replacement. Troubleshooting: System-specific diagnostic charts, symptom-based troubleshooting guides, common problems and solutions. Component Replacement: Step-by-step instructions for replacing major and minor components across all systems. Major Repairs: Engine rebuilds, transmission overhauls, suspension upgrades, brake system overhauls. Diagnostics: Electrical system diagnosis, engine performance diagnosis, HVAC system diagnosis, brake system diagnosis. Adjustments: Carburetor adjustment, ignition timing adjustment, clutch adjustment, parking brake adjustment, wheel alignment. Technical Depth Depth: Comprehensive from basic maintenance to complete engine and transmission rebuilds, including detailed diagnostic procedures and wiring diagrams. 📊 Manual Specifications File Format Searchable: Yes Printable: Yes Print Quality Quality: High-resolution scans with clear text and diagrams. Binding Type Binding: N/A (Digital PDF) Paper Type Paper: N/A (Digital PDF) ⚙️ Engine Specifications Primary Engine Engine Options: 3.9L V6 Magnum (incl. MPI), 5.2L V8 Magnum (incl. MPI), 5.9L V8 Magnum (incl. MPI), 5.9L Cummins Turbo Diesel (230hp/420 lb-ft torque typical for this era). Performance Horsepower Range: Approx. 125-230 hp (depending on engine) Torque Range: Approx. 200-420 lb-ft (depending on engine) Fuel System Fuel Delivery: Throttle Body Injection (TBI) and Multi-Point Fuel Injection (MPI) for gasoline; Direct Injection for Cummins Diesel. Fuel Type: Unleaded gasoline, Diesel fuel. Engine Code Examples 3.9L V6: 318 5.2L V8: 360 5.9L V8: 360 5.9L Cummins Diesel: 6BT 🔧 Transmission Standard Transmission Options: 4-speed Automatic (A500, A518), 5-speed Manual (Getrag G360 for diesel, NV4500 for gas/diesel variants). Optional Transmission Options: 3-speed Automatic (older models prior to significant MPI introduction), 4-speed Manual (e.g., NP435). Features Overdrive: Available on 4-speed automatics (A500/A518) and 5-speed manuals (NV4500). Fluid Specifications Automatic Fluid: ATF+3 or equivalent (check specific year/model, ATF+4 is often backward compatible but consult manual). Manual Fluid: GL-4 or GL-5 gear oil (specific weight and type dependent on transmission model). 📐 Dimensions Exterior Wheelbase Options: Various, typically 112-131 inches depending on cab and bed configuration. Body...