Scope:
Complete factory service and repair
Estimated Pages:
Hundreds (exact count varies by print version, digital often larger)
Type:
Workshop Service Repair Manual
Format:
Digital Download (PDF likely)
Engine Mechanical:
Engine assembly, disassembly, diagnostics, repair, including V6 and V8 variants
Engine Electrical:
Ignition system, starting and charging system, fuel injection system (EFI), emissions controls
Transmission:
Manual and automatic transmission repair, overhaul, and diagnostics
Drivetrain:
Four-wheel drive (4WD) system, transfer case, differentials, axles, driveshafts
Suspension:
Front and rear suspension systems, steering components, alignment specifications
Brakes:
Brake system (front disc, rear drum/disc depending on configuration), ABS (if equipped), parking brake
Electrical Body:
Lighting, power windows, locks, mirrors, interior controls, wiring diagrams
HVAC:
Heating, Ventilation, and Air Conditioning system service and repair
Body Chassis:
Body panel repair, frame straightening, exterior trim
Maintenance:
Routine service, fluid changes, filter replacements, lubrication
Troubleshooting:
Diagnostic charts, symptom-based troubleshooting, fault code interpretation
Repair:
Step-by-step instructions for component removal, installation, and overhaul
Diagnostics:
Electrical system diagnostics, mechanical system diagnostics
Rebuilds:
Engine and transmission overhaul procedures
Depth:
Comprehensive, from basic maintenance to full engine and transmission rebuilds
Engine Options:
3.9L V6, 5.2L V8 (Magnum), 5.9L V8 (Magnum)
Horsepower Range:
Approx. 125-230 hp (depending on engine and tuning)
Torque Range:
Approx. 200-330 lb-ft (depending on engine and tuning)
Fuel Delivery:
Electronic Fuel Injection (EFI)
Block Material:
Cast Iron
Cylinder Head Material:
Cast Iron or Aluminum (depending on V8 variant)
Spark Plug Gap:
0.035-0.040 inches (check manual for specific engine)
Recommended Oil Viscosity:
10W-30 or 10W-40 (API SG or higher)
Manual Transmission:
4-speed and 5-speed manual transmissions
Automatic Transmission:
3-speed and 4-speed automatic transmissions (e.g., A500, A518)
Transmission Fluid:
ATF+3 or equivalent for automatic transmissions (check manual for specifics)
Clutch Fluid:
DOT 3 Brake Fluid (for hydraulic clutch systems)
Wheelbase Options:
118.7 inches (standard cab), 131.4 inches (long bed standard cab), 148.7 inches (club cab)
Curb Weight Range:
Approx. 4,000 - 5,500 lbs (depending on configuration)
Gross Vehicle Weight Rating Range:
Approx. 5,000 - 8,500 lbs (GVWR varies by model and configuration)
Oil Change Interval:
Every 3,000-5,000 miles or 3-6 months (refer to manual for exact recommendation based on driving conditions)
Transmission Fluid Change Interval:
Every 30,000-60,000 miles or 2-3 years (depending on usage and fluid type)
Spark Plug Replacement Interval:
Every 30,000-100,000 miles (depending on plug type, e.g., copper vs. platinum)
Engine Coolant:
50/50 mix of ethylene glycol antifreeze and distilled water (Mopar or equivalent)
Power Steering Fluid:
Mopar Power Steering Fluid or equivalent Dexron II/III
Common Engine Issues:
Valve cover gasket leaks, intake manifold gasket leaks (especially 5.2/5.9 Magnum), cooling system leaks, distributor drive gear wear (early models).
Common Transmission Issues:
Leaking seals and gaskets, solenoid issues in automatic transmissions, clutch wear in manual transmissions.
Common Suspension Issues:
Worn ball joints, tie rod ends, and bushings due to heavy use.
Common Electrical Issues:
Corroded grounds, faulty sensors, intermittent issues with interior electronics.
Dodge Truck Legacy:
Dodge has a long history of producing durable and capable trucks dating back to the 1930s.
Third Generation Ram:
The 1990 model is part of the third generation of Dodge Ram trucks, which saw significant styling and engineering updates.
Manufacturing Plant:
St. Louis, Missouri, and Saltillo, Mexico (primary locations for this generation)
