Dodge RAM 1500/2500/3500 Truck Service Manual — 2004

This English-language Dodge RAM service manual covers the DR-series 1500, 2500, and 3500 platforms, including 4x2 and 4x4 configurations. Conventional Cab and Quad Cab models, short and long boxes, and light- and heavy-duty systems are distinguished throughout the relevant service sections.

Searchable Service Text and Wiring Diagram Access

Text search and chapter access: Service text is searchable, but many wiring diagram pages do not support text search. Embedded bookmarks provide access to the major service groups and numerous component procedures. The Foreword bookmark has no usable destination, and Comments returns to the opening page. Small wiring labels require zooming for comfortable reading.

One printable, 2,893-page PDF contains the manual, including the opening group tab locator, a 38-page component and system index, and 19 blank separator pages.

Engine, Drivetrain and Chassis Repair Coverage

The following selected service topics show the manual’s scope rather than reproduce its full contents. Other covered areas include restraint systems and body-component removal and installation.

• Engine repair: Step-by-step procedures for engine removal, cylinder-head service, piston and bearing inspection, lubrication-system repair, and valve-timing work.

• Fuel and emissions: Gasoline injection components, Cummins diesel fuel-system service, injector testing, turbocharger checks, and evaporative-emissions components.

• Transmission and transfer cases: Manual gearbox disassembly and assembly, automatic transmission hydraulic testing, clutch and valve-body service, and transfer-case overhaul.

• Axles and driveline: Differential setup, bearing preload and backlash adjustment, gear tooth contact checks, propeller-shaft diagnosis, and universal-joint service.

• Suspension, steering and brakes: Wheel alignment, LD 4WD ride-height adjustment, steering-gear repair, disc brake service, hydro-boost bleeding, and antilock-brake procedures.

• Electrical troubleshooting: Starting, charging, fuel/ignition, transmission-control, and all-wheel antilock-brake wiring diagrams, supported by connector pin-outs and component-location views.

• Cooling and HVAC: Cooling-system testing, thermostat and water-pump service, refrigerant-system diagnosis, compressor service, and heater and air-conditioning component replacement.

The diagnostic tests, internal overhaul procedures, and specified special tools suit technicians and experienced owners already familiar with automotive repair and workshop test equipment.

Gasoline and Cummins Engine Service

Separate engine sections cover the V6, V8, V10, and Cummins diesel configurations identified above. Cylinder-head, crankshaft, piston, lubrication, and timing sections contain component inspection criteria alongside the applicable removal and installation procedures.

The diesel section adds valve-lash verification, cylinder-head inspection, injector-related checks, and turbocharger diagnosis. Some fault paths refer to separate Powertrain Diagnostic Procedures information; this service manual does not replace those diagnostic publications.

The connecting-rod sections identify the 3.7L and 4.7L rod bolts as torque-to-yield fasteners that must not be reused. Their replacement requirements matter during bottom-end repair because these bolts secure the connecting-rod bearing caps.

Transmission Variants and Internal Repair

Dedicated chapters cover NV3500, NV4500, and NV5600 manual transmissions, plus 46RE, 48RE, and 45RFE/545RFE automatics. The NV4500 section distinguishes standard- and heavy-duty versions, including their different input shafts.

Automatic transmission diagnosis combines road-test observations with hydraulic pressure testing and clutch or band checks. Internal service sections include exploded assembly views, inspection criteria, and component-specific specifications.

Transfer-case chapters distinguish NV241 GENII and NV271 mechanically shifted units from NV243 and NV273 electronically shifted units. Electronic shift-system faults can require the separate diagnostic information referenced in those chapters.

Chassis Diagnosis and Component Identification

Body Code Plate decoding helps match drivetrain identification codes to the correct service section before selecting parts or procedures. Suspension coverage distinguishes independent front suspension from link/coil systems, including the LD 4WD height checks relevant to alignment.

Driveline vibration charts connect symptoms with shaft condition, joint wear, and operating angles. Propeller-shaft angle measurement references inclinometer 7663; differential sections add gear tooth contact pattern illustrations and setup measurements.

Steering-gear overhaul and hydro-boost service extend the coverage beyond routine maintenance. Fastener strength charts, engine vacuum schematics, and emission-control schematics provide additional references for identifying hardware and system connections.

Cooling-System Compatibility and Workshop Safety

The coolant section specifies HOAT coolant compatibility and warns that mixing incompatible coolant types can reduce corrosion protection and damage the engine.

For lifting, brake, airbag, diesel fuel-system, and refrigerant work, follow the applicable equipment