Coverage Years:
1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996
Included Models:
Jeep Comanche MJ (All trims and configurations)
Page Count:
Not Specified (PDF, typically comprehensive)
Manual Type:
Service Repair Manual
Manual Scope:
Factory Service Manual equivalent, Owner's Manual content
Delivery Method:
Instant Download
Software Requirements:
Adobe PDF Reader, WinZip
Operating Systems:
All Versions of Windows & Mac
Engine Mechanical:
Full coverage including disassembly, inspection, repair, and reassembly of all engine components.
Fuel System:
Fuel injection systems, fuel pumps, fuel tanks, lines, and emissions control components.
Ignition System:
Ignition timing, spark plugs, coils, distributors (if applicable), and electronic control modules.
Cooling System:
Radiator, water pump, thermostat, cooling fans, and hoses.
Lubrication System:
Oil pump, oil filter, oil pan, and lubrication passages.
Exhaust System:
Exhaust manifolds, catalytic converters, mufflers, and pipes.
Transmission Manual:
Service and repair procedures for manual transmissions.
Transmission Automatic:
Service and repair procedures for automatic transmissions.
Drivetrain:
Transfer case, driveshafts, axles, differentials, and CV joints.
Suspension System:
Front and rear suspension components, including control arms, springs, shocks, and bushings.
Steering System:
Steering column, steering gear, power steering pump, and linkages.
Brake System:
Front and rear brakes (disc/drum), ABS system (if equipped), master cylinder, brake lines, and calipers/wheel cylinders.
Electrical System:
Wiring diagrams, charging system, starting system, lighting, accessories, and diagnostic trouble codes (DTCs).
HVAC System:
Heating, ventilation, and air conditioning system components and service.
Body And Chassis:
Body panel removal/installation, frame, doors, windows, bumpers, and interior trim.
Body Electronics:
Power windows, locks, mirrors, and related control modules.
Diagnostic Troubleshooting:
Extensive troubleshooting guides and flowcharts for various system issues.
Maintenance Procedures:
Scheduled maintenance, fluid changes, filter replacements, tune-ups, and inspections.
Repair Procedures:
Step-by-step repair instructions for all major vehicle systems.
Disassembly Assembly:
Detailed instructions for removing and reinstalling components and sub-assemblies.
Cleaning Reinstallation:
Guidelines for cleaning parts during service and proper reinstallation techniques.
Torque Specifications:
Essential torque values for all critical fasteners.
Diagnostic Charts:
Flowcharts for diagnosing electrical and mechanical problems.
Troubleshooting Guides:
Detailed troubleshooting trees and symptom-based diagnostic procedures.
Depth Of Coverage:
Comprehensive, suitable for professional technicians and advanced DIY mechanics.
Skill Level Recommendation:
Requires basic knowledge of electrical and mechanical concepts; advanced repairs may require specialized tools.
Illustrations Diagrams:
Includes illustrations, diagrams, and schematics crucial for understanding complex procedures.
Engine Options 1:
2.5L AMC I4 (150 ci)
Engine Options 2:
4.0L AMC I6 (242 ci) - Popular performance option
Engine Options 3:
2.1L VM Motori Turbo Diesel I4 (OM602 based) - Less common, diesel specific service may vary.
Horsepower 4.0L Approx:
173-190 hp (varies by year and spec)
Torque 4.0L Approx:
220-245 lb-ft (varies by year and spec)
Fuel Injection Type:
Multi-point Fuel Injection (MPI) for 4.0L, Throttle Body Injection (TBI) for 2.5L initially, transitioning to MPI.
Block Material:
Cast Iron
Head Material:
Aluminum (4.0L), Cast Iron (2.5L)
Valvetrain 4.0L:
Overhead Valve (OHV), 12 valves
Manual Transmission Options:
Aisin AX-5 (4-cyl/base 6-cyl), Aisin AX-15 (6-cyl)
Automatic Transmission Options:
Chrysler/Jeep A904/A999 (2WD), Chrysler/Jeep A500/42RH (4WD, early models), Chrysler/Jeep 44RE (4WD, later models)
Transfer Case Options:
New Process NP207 (Command-Trac), New Process NP231 (Command-Trac), New Process NP242 (Selec-Trac)
Oil Change Interval Typical:
Every 3,000-5,000 miles or 3-6 months, depending on oil type and driving conditions.
Tune Up Interval Typical:
Spark plugs and filters every 30,000-60,000 miles; ignition wires as needed.
Coolant Flush Interval Typical:
Every 2 years or 30,000 miles.
Engine Oil Spec 4.0L:
API SG or higher, SAE 10W-30 or 10W-40 (check manual for exact year recommendation).
Transmission Fluid Atf:
Chrysler ATF+4 (or equivalent for earlier transmissions like ATF+3 or Dexron III depending on original fill).
Coolant Type:
Ethylene glycol based, typically green coolant (consult manual for specific OAT/HOAT requirements if updated).
Power Steering Fluid:
ATF+3 or Dexron III (consult manual)
Common Issues Frame Rust:
Rust on frame rails, especially around rear axle and front section, is a significant concern due to age and exposure.
Common Issues Engine 4.0L:
Cracked cylinder heads (later 4.0Ls), oil filter adapter seal leaks, camshaft position sensor failures.
Common Issues Electrical:
Wiring harness degradation, intermittent electrical connections, faulty grounds, PDC (Power Distribution Center) issues.
Common Issues Suspension Steering:
Worn ball joints, tie rod ends, bushings, and steering box wear are common on high-mileage units.
Oil Filter Example 4.0L:
Wix 51515, Fram PH8A (Check specific year/engine for exact fitment)
Jeep Legacy:
Builds on Jeep's reputation for ruggedness and off-road capability.
Comanche Development:
Based on the popular Cherokee XJ platform, offering a unibody construction for a pickup truck, which was innovative at the time.
Key Changes Through Years:
Engine upgrades (4.0L I6 introduction), transmission improvements, safety feature additions (airbags, ABS), minor styling tweaks.
Production Period:
1984-1992 (official production for MJ). Manual coverage extends to 1996.
Manufacturing Location:
USA
