2003 Dodge RAM Truck 1500, 2500, 3500 Service Manual (P/N C4256-90954)
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Dodge Models Covered & Key Technical Specifications
Models: 2003 Dodge RAM Truck 1500, 2003 Dodge RAM Truck 2500, 2003 Dodge RAM Truck 3500
Sub-models / Variants: 4X2, 4X4, 1500, 2500, 3500, Conventional Cab, Quad Cab, Short Box, Long Box, Light Duty (LD), Heavy Duty (HD)
Model Years: 2003
Serial Numbers: VIN character 10 = 3
Technical Data:
- Engine displacement: 3.7L, 4.7L, 5.7L, 5.9L Turbo Diesel, 5.9L Turbo Diesel High Output, 8.0L
- Transmission types: 4-speed Automatic (46RE, 45RFE, 47RE, 48RE), 5-speed Manual (NV3500, NV4500), 6-speed Manual (NV5600)
- Fuel types: Gasoline, Diesel
- Drive systems: 4X2, 4X4
- Coolant capacity (5.9L Diesel): 28 liters (29.5 quarts)
- Fuel tank capacity (Short Box): 98 liters (26 gallons)
- Torque (Hub/Bearing Bolts LD): 163 Nm (120 ft-lbs)
- Torque (Hub/Bearing Bolts HD 4X2): 176 Nm (130 ft-lbs)
- Axle thrust angle (1500): 0° ± 0.4°
Dodge Manual Features & Content Preview
- Covers 2003 Dodge RAM Truck 1500, 2500, and 3500 models, including 4X2 and 4X4 drivetrain configurations, standard and quad cab body styles, and engine options from the 3.7L V6 to the 8.0L V10
- Official DaimlerChrysler Corporation publication P/N C4256-90954, first edition 2003
- Documents factory-specified torque values, electrical schematics, powertrain specifications, and fluid capacity requirements for the entire vehicle lineup
- Contains 47 technical diagrams, 4 detailed component index lists, 5 fastener strength charts, and 4 maintenance schedule tables
Component and System Documentation
This manual breaks down the core vehicle systems. It organizes technical data into logical sections for quick bench reference. You will find comprehensive overviews of engine and lubrication systems, alongside transmission, transfer case, and chassis-specific drivetrain components. Chapters also cover differential and driveline maintenance, independent front suspension configurations, and rear suspension assemblies. Everything is laid out to provide exact technical parameters for professional review.
Technical Data Preview
The publication outlines specifications for standard hardware grades ranging from SAE Grade 2 through Grade 8, as well as metric strength classes 9.8 and 10.9. Coolant system capacities are explicitly listed. For example, the 3.7L engine requires 15.4 liters, while the 5.9L Diesel takes 28 liters. In the independent front suspension section, the hub/bearing bolt torque for light-duty models is set at 163 Nm (120 ft-lbs). You will find torque references for fasteners across engine, suspension, and axle assemblies. Cylinder head bolt torque values follow a strict multi-stage sequence, noting final-stage angles of 130°–140° in the engine assembly data. Note that this page outlines the manual's contents and does not provide standalone repair or diagnostic instructions. Always verify these specifications and consult a certified technician before turning wrenches or performing service on this equipment.
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