2023 Ram 4000 Service and Repair Manual

This factory service and repair manual for the 2023 Ram 4000 covers a truck offered with a choice of engines: a 5.7L or a 6.4L gasoline V8, 345 and 392 cubic inches respectively, neither turbocharged and both with overhead valves. The truck came as a 2-door cab and chassis or a 4-door crew cab and chassis, trimmed as Crew, P or PL. Specifications, torque values, wiring diagrams and diagnostics are given for the engines, fuel and cooling systems, drivetrain, brakes, steering, suspension and body of those configurations.

Engines covered

• 5.7L V8 (345 cu in) — OHV, naturally aspirated, gasoline
• 6.4L V8 (392 cu in) — OHV, naturally aspirated, gasoline

Body styles covered

• 2-door cab & chassis
• 4-door cab & chassis, crew cab

Trims covered

• Crew
• P
• PL

Known issues on the 2023 4000. For a gasoline cab and chassis truck with two V8 displacements, the systems that matter most are the engine, fuel system, ignition and cooling system, and the manual addresses them with procedures, specifications and diagnostics for the 5.7L and 6.4L. It adds torque values for the transmission, drivetrain, brakes, suspension and steering, which carry the cab and chassis. The 2-door and crew cab versions, in Crew, P and PL trims, are covered by wiring diagrams for the electrical system and body.