The 1986 Jeep Comanche Service Manual provides comprehensive technical information for maintaining and repairing the Jeep Comanche pickup truck. This manual covers all major systems including engine, transmission, drivetrain, suspension, brakes, electrical, and body components. Below are key sections for specifications, maintenance procedures, troubleshooting, and service guidelines.
Complete technical specifications for the 1986 Jeep Comanche including engine options, dimensions, capacities, and performance data.
| Specification | Details |
|---|---|
| Engine Options | 2.5L I4, 2.8L V6 |
| Transmission | 4-speed manual, 5-speed manual, 3-speed automatic |
| Drivetrain | 2WD, 4WD Select-Trac |
| Wheelbase | 113.0 inches (SWB), 119.6 inches (LWB) |
| Payload Capacity | 1,100 - 2,200 lbs |
| Fuel Capacity | 16.5 gallons |
| Towing Capacity | 2,000 - 4,000 lbs |
| Gross Vehicle Weight | 4,300 - 5,200 lbs |
| Bed Length | 6 ft (SWB), 7 ft (LWB) |
| Ground Clearance | 7.8 inches |
Detailed service procedures for engine maintenance, repair, and troubleshooting.
WARNING! Always disconnect battery before working on electrical components. Use proper lifting equipment for engine removal.
Service procedures for manual and automatic transmissions, transfer case, and differentials.
CAUTION! Use proper transmission fluid types. Always support vehicle securely when working underneath.
Complete brake system service including hydraulic systems, drums, and discs.
Front Brakes: Disc brakes, caliper service, rotor replacement. Rear Brakes: Drum brakes, shoe replacement, wheel cylinder service.
Hydraulic System: Master cylinder bench bleeding, line replacement, proportioning valve service. Parking Brake: Cable adjustment and service procedures. Brake Fluid: DOT 3 specification, system flushing procedure.
Wiring diagrams, component testing, and electrical system repair.
Tip: Always use multimeter for electrical diagnosis. Refer to wiring diagrams for circuit tracing.
Body panel repair, interior component service, and trim replacement.
WARNING! Use proper safety equipment when working with glass and sharp metal edges.
Recommended maintenance intervals and service procedures.
| Interval | Service Required |
|---|---|
| 3,000 miles | Oil change, filter replacement |
| 6,000 miles | Tire rotation, brake inspection |
| 12,000 miles | Air filter, fuel filter replacement |
| 24,000 miles | Coolant flush, transmission service |
| 30,000 miles | Spark plugs, wires, cap and rotor |
| 60,000 miles | Timing belt, water pump replacement |
Common problems and diagnostic procedures for the 1986 Jeep Comanche.
| Symptom | Possible Cause | Corrective Action |
|---|---|---|
| Engine won't start | Fuel, spark, or compression issue | Check fuel pressure, spark plugs, compression test |
| Poor fuel economy | Carburetor adjustment, timing | Adjust carburetor mixture, check ignition timing |
| Transmission slipping | Low fluid, worn bands | Check fluid level, adjust bands if applicable |
| Brake pulling | Stuck caliper, contaminated pads | Inspect calipers, replace brake pads |
| Electrical issues | Ground connections, battery | Check ground straps, battery connections |
Factory-issued service bulletins addressing common issues and updates.
TSB 86-001: Carburetor idle mixture adjustment procedure. TSB 86-005: Transmission shift linkage adjustment. TSB 86-012: Electrical ground strap corrosion prevention. TSB 86-018: Front end vibration diagnosis and repair.
Complete electrical schematics for all vehicle systems.
Service Support: Contact Jeep dealership or certified service center for technical assistance.