🏷️ Basic Information

Make:

Dodge

Model:

Ram 50

Year:

1991

Chassis Code:

MN150/MN200 Series

👋 Introduction

Positioning:

A robust and reliable compact pickup truck that bridged the gap between smaller imports and larger domestic trucks. Targeted at tradespeople, small businesses, and individuals seeking a versatile and economical utility vehicle.

Competitors:

Ford Ranger, Chevrolet S-10, Toyota Pickup, Nissan Hardbody, Mazda B-Series

Features:

Available in 2WD and 4WD, choice of gasoline engines, sturdy construction, practical bed configurations, reliable powertrain options.

📋 Manual Details

Primary Coverage:

Service, Repair, Maintenance, Diagnosis, Troubleshooting

Estimated Page Count:

Varies by specific dealership publication, typically 1000+ pages for a complete set

Type:

Factory Service Manual (FSM) / Repair Manual

Language:

English

Format:

Digital (PDF)

📖 Manual Coverage

Engine Mechanical:

Engine assembly, cylinder head, block, crankshaft, pistons, connecting rods, lubrication, cooling system, fuel system, exhaust system, emissions control

Engine Control:

Engine control module (ECM), ignition system, starting system, charging system, fuel injection system

Transmission Manual:

Clutch system, manual transmission assembly, shift linkage, transfer case (if applicable)

Transmission Automatic:

Automatic transmission assembly, torque converter, transmission control system

Drivetrain:

Drive shaft, universal joints, rear axle assembly, differential, front axle (if 4WD), CV joints

Suspension Steering:

Front suspension (independent or solid axle depending on variant), rear suspension (leaf springs), steering column, power steering system, steering gear

Brakes:

Front brake system (disc or drum), rear brake system (drum), parking brake system, hydraulic system, ABS (if equipped)

Wheels Tires:

Wheel alignment, tire specifications, wheel replacement

Body Exterior:

Body panels, doors, hood, tailgate, glass, mirrors, exterior trim, bumpers

Body Interior:

Seating, interior trim, dashboard, instrument panel, airbags (Supplemental Restraint System - SRS), seat belts, door locks, power windows

HVAC:

Air conditioning system, heater, ventilation system

Electrical System:

Battery, charging system, starting system, lighting, fuses, relays, wiring harnesses, multiplex communication (if applicable)

Instrumentation Controls:

Instrument cluster, gauges, warning lights, switches, controls

Wiper Washer:

Wiper system, washer system

Audio Visual:

Radio, speakers, antenna

Cruise Control:

Cruise control system diagnosis and repair

Immobilizer:

Engine immobilizer system (if equipped)

Maintenance Schedule:

Routine maintenance procedures, service intervals, fluid level checks, filter replacements

Diagnosis Troubleshooting:

Diagnostic trouble codes (DTCs), symptom-based troubleshooting charts, wiring diagrams for fault finding

Repair Rebuild:

Step-by-step instructions for component removal, disassembly, inspection, repair, assembly, and installation

Specifications:

Torque specifications, clearances, fluid capacities, pressure specifications, electrical values

Wiring Schematics:

Complete electrical wiring diagrams for all vehicle systems

Depth:

Comprehensive, ranging from basic maintenance and fluid changes to complete engine and transmission overhauls, electrical system diagnosis, and body repair.

📊 Manual Specifications

Format:

PDF

Printability:

High-resolution, printable pages

Binding:

N/A (Digital Format)

Paper Type:

N/A (Digital Format)

⚙️ Engine Specifications

Engine 1:

2.4L 4G63 Inline-4 (Mitsubishi origin)

Engine 1 Displacement:

2351 cc (2.4 Liters)

Engine 1 Horsepower:

Approx. 105-113 hp @ 4500-5000 rpm (depending on specific tune and emissions equipment)

Engine 1 Torque:

Approx. 135-145 lb-ft @ 2500-3000 rpm

Engine 1 Fuel System:

Electronic Fuel Injection (EFI)

Engine 2:

3.0L 6G72 V6 (Mitsubishi origin)

Engine 2 Displacement:

2972 cc (3.0 Liters)

Engine 2 Horsepower:

Approx. 140-145 hp @ 4800-5000 rpm

Engine 2 Torque:

Approx. 160-170 lb-ft @ 2500-3000 rpm

Engine 2 Fuel System:

Electronic Fuel Injection (EFI)

🔧 Transmission

Standard Transmission:

5-Speed Manual Transmission

Optional Transmission:

4-Speed Automatic Transmission

Transfer Case:

Available with a 2-speed transfer case for 4WD models

📐 Dimensions

Wheelbase Std Cab:

Approx. 109.4 inches (2780 mm)

Wheelbase Extended Cab:

Approx. 125.2 inches (3180 mm)

Bed Length Std:

Approx. 73.4 inches (1865 mm)

Bed Length Long:

Approx. 87.4 inches (2220 mm)

Curb Weight Approx:

3000 - 3700 lbs (1360 - 1680 kg) depending on configuration

🛡️ Safety Features

NHTSA Ratings:

Not specifically rated by NHTSA under modern standards. Typical for its era.

Active Safety:

Standard seat belts, optional ABS on some models

Passive Safety:

Collapsible steering column, reinforced cabin structure (typical for light trucks of the era)

💡 Technology Features

Infotainment System:

Basic AM/FM radio, optional cassette player. Aftermarket head units are common upgrades.

Driver Assistance:

Limited to optional ABS on rear wheels for some models and model years.

Connectivity:

No factory-integrated connectivity features as understood today. Basic wiring for radio antenna and speakers.

🔧 Maintenance

Oil Change Interval:

Every 3,000 miles or 3 months (typical for the era, refer to manual for exact specification).

Transmission Fluid Change Interval:

Every 30,000-60,000 miles, depending on usage and transmission type (refer to manual).

Spark Plugs:

Inspect every 30,000 miles, replace as needed.

Timing Belt:

For 2.4L 4G63 engine, inspect at intervals and replace typically around 60,000-90,000 miles. Critical to follow manual. (Note: Some 4G63 variants are belt-driven, others chain-driven. Manual is essential for confirmation).

Engine Oil Type:

API SG or SF, SAE 10W-30 or 10W-40 (refer to manual for exact viscosity based on temperature).

Coolant Type:

Ethylene glycol-based antifreeze (typically green), 50/50 mix with distilled water.

Brake Fluid Type:

DOT 3 brake fluid.

Transmission Fluid Manual:

GL-4 gear oil, SAE 75W-90 or 80W-90 (refer to manual for specific type).

Transmission Fluid Automatic:

ATF Dexron III (or equivalent specified by Mitsubishi/Dodge).

Common Problems:

Rust in wheel wells, rocker panels, and cab corners; potential for ignition system component failure (coil, module); exhaust manifold cracks (especially on V6); rear main seal leaks; manual transmission synchro wear; aging electrical connectors and grounds leading to intermittent issues.

📚 Vehicle History

Heritage:

Dodge, as a division of Chrysler, had a history of producing trucks, including light-duty pickups. The Ram 50 was part of a strategic partnership with Mitsubishi, utilizing their vehicle platforms.

Evolution:

The Dodge Ram 50 was a rebadged Mitsubishi Mighty Max/Forte. It underwent styling and mechanical updates throughout its production run, sharing platforms with its Mitsubishi counterparts. The 1991 model year represents the later phase of the second generation.

Production Years:

1978-1996 (as Dodge Ram 50/D50), built on Mitsubishi platforms.

🏆 Awards & Recognition

Awards:

No significant individual awards are typically cited for the 1991 Dodge Ram 50. Its value was in its utility and affordability within the compact truck segment.