The 1988 Jeep Wrangler Factory Service Manual provides comprehensive technical information for the proper maintenance, repair, and service of the 1988 Jeep Wrangler. This manual covers all major systems including the 2.5L AMC 150 inline-4 and 4.2L AMC 258 inline-6 engines, 5-speed manual and 3-speed automatic transmissions, 4WD systems, suspension, brakes, electrical systems, and body components. Below are key sections for specifications, maintenance procedures, troubleshooting, and technical data.
Complete technical specifications for the 1988 Jeep Wrangler including engine options, dimensions, capacities, and performance data.
| Specification | Description |
|---|---|
| Engine Options | 2.5L AMC 150 I4, 4.2L AMC 258 I6 |
| Horsepower | 117 hp @ 5000 rpm (2.5L), 112 hp @ 3200 rpm (4.2L) |
| Torque | 135 lb-ft @ 3000 rpm (2.5L), 210 lb-ft @ 2000 rpm (4.2L) |
| Transmission | 5-speed manual, 3-speed automatic |
| Transfer Case | Command-Trac part-time 4WD |
| Wheelbase | 93.4 inches |
| Length | 152.3 inches |
| Width | 66.0 inches |
| Height | 70.9 inches |
| Fuel Capacity | 15 gallons |
Detailed service procedures for both 2.5L and 4.2L engine configurations.
WARNING! Always disconnect battery before performing engine service. Use proper lifting equipment for engine removal.
Service procedures for manual and automatic transmissions, transfer case, and axle assemblies.
CAUTION! Use only specified transmission fluids. Properly support vehicle when working underneath.
Complete brake system service including hydraulic systems, drum brakes, and parking brake.
Front Brakes: Disc brakes with single piston calipers. Rear Brakes: Drum brakes with self-adjusting mechanism.
Brake bleeding procedures, master cylinder service, brake line inspection, parking brake cable adjustment, and brake shoe/pad replacement specifications.
Comprehensive electrical system diagnosis and repair procedures.
Tip: Use factory wiring diagrams for accurate diagnosis of electrical issues.
Body panel alignment, door adjustment, soft top installation, and interior component service.
WARNING! Use proper tools for body panel alignment to avoid damage to paint and sheet metal.
Factory recommended maintenance intervals and service procedures.
| Service Interval | Required Maintenance |
|---|---|
| 3,000 miles | Oil change, filter replacement |
| 6,000 miles | Lube chassis, check fluid levels |
| 15,000 miles | Air filter replacement, brake inspection |
| 30,000 miles | Coolant flush, transmission service |
| 60,000 miles | Timing chain inspection, major tune-up |
Diagnostic procedures for common 1988 Wrangler issues.
| Symptom | Possible Cause | Corrective Action |
|---|---|---|
| Engine won't start | Fuel delivery, ignition system | Check fuel pump, spark plugs, ignition coil |
| 4WD not engaging | Transfer case linkage, vacuum system | Adjust linkage, check vacuum lines |
| Brake pull | Calipers, brake fluid | Inspect calipers, flush brake fluid |
| Electrical issues | Ground connections, battery | Check grounds, test battery and alternator |
| Transmission noise | Fluid level, bearings | Check fluid, inspect for bearing wear |
Factory specifications and technical reference data.
Complete electrical schematics for all vehicle systems.
Detailed wiring diagrams including: starting and charging systems, ignition system, lighting circuits, instrument panel, accessory circuits, and ground distribution. Color-coded for easy identification of wire colors and circuit paths.
Service Support: For technical assistance, contact Chrysler Technical Service or authorized Jeep dealership.