Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 1978 W300.
The 1978 Dodge W300 stands as a heavy-duty pickup in Dodge's W-series lineup, a three-quarter-ton four-wheel-drive work truck built on the familiar Dodge truck platform of the era. As a W300, it occupied the upper end of Dodge's light-truck range, designed for buyers who needed serious hauling and towing capability in a rugged, no-nonsense package. The 1978 model year falls within a long-running generation of Dodge trucks that earned a strong reputation for mechanical durability and straightforward serviceability, making this year a solid representative of the platform's well-regarded reliability record — a truck that, for researchers, reflects the mature, proven stage of Dodge's heavy-duty truck development rather than an experimental or transitional moment.
Condensed service procedures for routine maintenance. Procedures that require dealer diagnostic equipment are identified and summarized only.
| Tool required | DRBIII scan tool (dealer / locksmith) |
| Why | Transmitter codes are written into the receiver in the passenger door module |
| When needed | After Sentry Key Immobilizer Module (SKIM) replacement |
| Tool required | DRBIII scan tool |
| Also required | The vehicle's four-digit PIN code |
Owner-reported issues, recalls, investigations and service bulletins on record with NHTSA — an unfiltered look at what owners actually experience.
Showing 2 of 2 campaigns on record for this vehicle.
AN INTERMEDIATE STEERING SHAFT CONTAINING A MISMATCHED POT COUPLING ASSEMBLY MAY HAVE BEEN INSTALLED ON THE INVOLVED VEHICLES. THIS COUPLING MAY HAVE AN OVERSIZED SERRATION DIAMETER. AN OVERSIZED SERRATION COULD PREVENT… Remedy: THE DEALER WILL INSPECT AND, IF NECESSARY, INSTALL A REPLACEMENT SHAFT COUPLING.
Remedy: DEALER WILL INSPECT THE FUEL TANK VENT SYSTEMS FOR BLOCKAGE AND CORRECT, IF NECESSARY. FUEL TANKS WILL BE INSPECTED FOR CRACKING OF THE FRONT PANEL AND REPLACED, IF NECESSARY.
The most common OBD-II codes for this vehicle's emissions system. These are standardized SAE J2012 definitions, not vehicle-specific fault reports.
Decode factory build data for a specific vehicle by VIN.
Cross-vehicle references for the kinds of data on this page.
NHTSA lists 2 recall campaign(s) for this model year. Check your specific vehicle by VIN.