🏷️ Basic Information

Make:

Jeep

Model:

Comanche

Model Code:

MJ

Product Type:

Workshop Service Repair Manual

👋 Introduction

Positioning:

The Jeep Comanche (MJ) was a compact pickup truck produced by Jeep, based on the Cherokee (XJ) platform. It offered Jeep's renowned off-road capability in a pickup truck configuration, making it a unique and capable vehicle in its segment.

Segment:

Compact Pickup Truck.

Competitors:

Competed against compact pickup trucks like the Ford Ranger, Chevrolet S-10, Nissan Hardbody, and Toyota Pickup.

Features:

Unibody construction (shared with Cherokee XJ), robust 4x4 systems (Command-Trac, Selec-Trac), available AMC inline-six engines, and versatile cargo bed options.

Unique Selling Proposition:

The Comanche's combination of Jeep's legendary 4x4 capability with a practical pickup bed made it a niche but highly regarded vehicle for off-roading and utility.

📋 Manual Details

Years Covered:

1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996

Total Pages:

339

Type:

Service Repair Manual

Availability:

Instant Download PDF.

Language:

English

File Format:

PDF

📖 Manual Coverage

Engine:

Detailed diagnosis, repair, removal, installation, adjustments, specifications for all engine types.

Transmission:

Service and repair for manual and automatic transmissions, including clutch, driveshafts, and differentials.

Brakes:

Complete coverage of hydraulic systems, components, adjustments, and troubleshooting.

Suspension And Steering:

Front and rear suspension components, steering gear, power steering, alignment procedures.

Electrical System:

Wiring diagrams, component testing, diagnosis of lighting, ignition, charging, starting, and accessory systems.

Fuel System:

Fuel delivery, injection systems, fuel tanks, lines, and emissions controls.

Cooling System:

Radiator, fan, water pump, thermostat, and coolant specifications.

Exhaust System:

Mufflers, catalytic converters, pipes, and mounting hardware.

Body And Frame:

Exterior panel removal/installation, body hardware, chassis components, doors, windows, and interior trim.

Chassis And Suspension:

Frame construction, suspension components (front and rear), shock absorbers, springs, bushings, alignment specifications.

Heating Ventilation And Air Conditioning:

HVAC system components, diagnosis, repair, and refrigerant handling.

Body Interior And Exterior:

Door mechanisms, window regulators, seat adjustments, interior trim panel removal, exterior trim, bumpers, grille, tailgate.

Routine Maintenance:

Oil changes, filter replacements, fluid checks, tire rotations, spark plug replacement.

Troubleshooting:

Diagnostic guides for common problems, symptom-based troubleshooting.

Repair And Rebuild:

Step-by-step instructions for component disassembly, repair, and reassembly.

Adjustments:

Detailed procedures for setting clearances, torques, and calibrations.

Installation:

Procedures for installing new or replacement parts and components.

Safety Precautions:

Detailed safety notes, warnings, and precautions for all repair procedures.

Wiring Diagrams:

Comprehensive electrical wiring diagrams for all vehicle systems.

Tightening Torques:

Specific torque values for all critical fasteners and engine components.

Depth:

Comprehensive, covering everything from basic maintenance to complete engine and transmission rebuilds, including detailed diagnostics.

Diagnostic Tools:

Information on specific diagnostic procedures and specialized service tools required for repairs.

Specifications And Data:

Includes service data, specifications lists, factory specifications, and allowable limits for parts and adjustments.

📊 Manual Specifications

Quality:

High-resolution PDF, ensuring clear text and images.

Compatibility:

Windows, Mac, Linux OS.

Requirement:

Adobe Reader.

Searchability:

Likely text-searchable PDF if originally created digitally, or OCR'd for searchability.

Printability:

Fully printable, allowing users to print specific sections or the entire manual.

Binding:

N/A (Digital PDF)

Paper Type:

N/A (Digital PDF)

⚙️ Engine Specifications

Engine Options:

2.5L AMC I4, 2.1L Renault turbodiesel (early years), 4.0L AMC I6 (most common and sought-after).

Engine Code 2.5L I4:

AMC 150

Engine Code 4.0L I6:

AMC 242

4.0L I6 Hp:

Approx. 173-190 hp (depending on year and specific tuning)

4.0L I6 Torque:

Approx. 220-245 lb-ft (depending on year and specific tuning)

Fuel Delivery:

Electronic Fuel Injection (EFI)

🔧 Transmission

Standard Transmission Type:

5-speed manual (e.g., Aisin AX-5)

Optional Transmission Type:

3-speed automatic (e.g., Chrysler A904), 4-speed automatic (e.g., Chrysler A727/A518 for some models/years)

Drivetrain Options:

2WD (Rear-wheel drive), 4WD (Four-wheel drive with Command-Trac or Selec-Trac transfer cases).

📐 Dimensions

Wheelbase Short:

113.9 inches

Wheelbase Long:

124.9 inches

Bed Length Standard:

6 feet

Bed Length Long:

7 feet

Curb Weight Range:

Approx. 3,200 - 3,800 lbs (depending on configuration)

🛡️ Safety Features

Crash Test Info:

Information available through historical NHTSA data; specific ratings vary by year and testing protocols.

Active Safety:

ABS (Anti-lock Braking System) available on later models, especially 4WD variants. Limited driver-assistance features for the era.

Passive Safety:

Seat belts, reinforced cabin structure due to unibody design.

💡 Technology Features

Infotainment Features:

Basic AM/FM radio, optional cassette player, manual HVAC controls. Limited by the era of production.

Driver Assistance Features:

Primarily focused on off-road capability; basic features like power steering and power brakes were available. ABS on later models.

Connectivity Options:

N/A (No modern connectivity features like Bluetooth or USB).

🔧 Maintenance

Oil Change Interval:

Typically every 3,000 - 5,000 miles or 6 months, depending on driving conditions and oil type used (check manual for specifics).

Transmission Fluid Change:

Every 30,000 - 60,000 miles for automatic transmissions, manual transmission fluid checks and changes as per manual recommendations.

Brake Fluid Change:

Recommended every 2-3 years or as per manual; check for contamination.

Engine Oil Type:

API SG or higher, SAE 10W-30 or 10W-40 commonly recommended for 4.0L I6 (refer to manual for precise specifications by year/engine).

Coolant Type:

Ethylene glycol-based antifreeze, typically a green coolant (e.g., Mopar Antifreeze/Coolant).

Transmission Fluid Type Auto:

ATF+4 or equivalent (for later Chrysler automatics), ATF DEXRON-II or III for earlier models (verify specific transmission).

Power Steering Fluid:

ATF DEXRON-II or III equivalent.

Differential Fluid:

GL-5 gear oil, SAE 80W-90 or 75W-90 (check specific axle type).

Common Problems:

Head gasket issues on early 4.0L engines, radiator leaks, interior trim degradation, potential rust on body panels and frame components, aging electrical connectors.

Common Repairs:

Repairing cooling system, addressing minor oil leaks, replacing worn suspension components, electrical system diagnostics.

Engine Performance Issues:

Potential for oil consumption in high-mileage engines, spark plug fouling, idle control issues.

Transmission Issues:

Slipping in automatics, clutch wear in manuals, selector linkage issues.

Electrical Issues:

Corroded grounds, faulty relays, failing alternator or starter.

📚 Vehicle History

Jeep Legacy:

Jeep's long-standing reputation for off-road capability and ruggedness, established with the Willys Jeep and continued through models like the CJ and Cherokee.

Comanche Development:

Developed by American Motors Corporation (AMC) prior to Chrysler's acquisition of Jeep. Based on the highly successful XJ Cherokee platform, it shared many components, including the unibody structure and powertrain options.

Production Years:

1985-1992 (although the manual covers up to 1996 due to potential overlap with continued sales or specific interpretations of the platform's life cycle, often tied to the XJ's extended production).

🏆 Awards & Recognition

Awards:

While the Comanche itself didn't win specific awards as a standalone model, it benefited from the Cherokee's strong reputation, particularly its off-road prowess and the robust nature of the 4.0L inline-six engine, which became legendary in Jeep circles.