Segment:
Compact SUV / Off-Road Vehicle
Usp:
Iconic off-road capability, rugged design, convertible option.
Key Competitors:
Toyota 4Runner, Nissan Pathfinder, Ford Bronco (previous generation).
Body Styles:
2-door convertible (soft top/hardtop options), 4-door (Unlimited variant introduced later).
4X4 Systems:
Command-Trac NV231 (standard), optional Selec-Trac NV242 (full-time 4WD).
Primary Coverage:
1998 Jeep Wrangler
Secondary Coverage:
All TJ models (Sahara, Sport, SE)
Estimated Pages:
Over 1500 (typical for comprehensive workshop manuals of this era)
Type:
Complete Workshop Service Repair Manual
Format:
Downloadable Digital Format (PDF)
Powertrain:
Engine mechanical, fuel system, ignition system, cooling system, exhaust system, automatic transmission, manual transmission, transfer case, driveline.
Chassis:
Front suspension, rear suspension, steering system, brake system (front disc, rear drum), wheels and tires.
Body And Interior:
Body structure, exterior trim, interior trim, seats, HVAC system, doors, windows, power accessories.
Electrical And Electronics:
Battery, charging system, starting system, lighting, instrumentation, power distribution, wiring diagrams, body control modules, engine control modules (ECM).
Maintenance:
Scheduled maintenance intervals, fluid checks and changes, filter replacements, lubrication.
Diagnostics And Troubleshooting:
System diagnostics, symptom-based troubleshooting, diagnostic trouble codes (DTCs), testing procedures.
Repair And Rebuild:
Component removal and installation, engine overhaul, transmission overhaul, brake caliper rebuilding, suspension component replacement.
Specifications And Tolerances:
Torque specifications, clearances, fluid capacities, component dimensions, electrical specifications.
Depth:
Comprehensive. Covers basic maintenance to complete engine and transmission rebuilds, including detailed diagnostic procedures and wiring diagrams.
Engine Code:
6 Cylinder, 4.0L (242 cu in) 'Power Tech' inline-6
Engine Configuration:
Inline-6, Overhead Valve (OHV)
Bore X Stroke:
3.88 in x 3.56 in (98.5 mm x 90.5 mm)
Horsepower:
181 hp @ 4600 RPM
Torque:
220 lb-ft @ 3200 RPM
Fuel Induction:
Multi-point Fuel Injection (MPI)
Fuel Type:
Unleaded Regular Octane 87
Oil Capacity:
6 US quarts (5.7 Liters) with filter
Cooling System Capacity:
11.2 US quarts (10.6 Liters)
Engine Code:
4 Cylinder, 2.5L (150 cu in) 'High Output' inline-4
Engine Name:
AMC 258 (modified, known as 2.5L OHV)
Horsepower:
119 hp @ 4700 RPM
Torque:
145 lb-ft @ 3000 RPM
Fuel Induction:
Multi-point Fuel Injection (MPI)
Transmission Type:
5-speed manual transmission
Transmission Model:
AX-15
Transmission Type:
4-speed automatic transmission
Transmission Model:
42RLE
Transfer Case:
NV231 Command-Trac (part-time, 2WD, 4WD part-time, 4WD low) or NV242 Selec-Trac (full-time, 2WD, 4WD part-time, 4WD low).
Transmission Fluid Type:
Manual: ATF+4 (older specs may list Dexron III); Automatic: ATF+4 (MS-9602)
NHTSA Frontal Crash Driver:
N/A (Vehicle not tested under current NHTSA standards for this model year)
NHTSA Frontal Crash Passenger:
N/A (Vehicle not tested under current NHTSA standards for this model year)
ABS:
Optional on some models, standard on others.
Traction Control:
Not typically available for 1998 models.
Airbags:
Driver and passenger front airbags.
Seat Belts:
Three-point front seat belts, lap belts in rear.
Oil Change Interval:
Every 3,000 - 5,000 miles (4,800 - 8,000 km) or 6 months, whichever comes first. Check manual for specific conditions.
Air Filter Replacement:
Every 15,000 miles (24,000 km) or as needed based on driving conditions.
Spark Plug Replacement:
Every 30,000 miles (48,000 km) for 4.0L, 100,000 miles (160,000 km) for 2.5L (if equipped with platinum plugs).
Transmission Fluid Change:
Every 30,000 miles (48,000 km) for automatic, 50,000 miles (80,000 km) for manual.
Engine Oil Grade:
SAE 10W-30 (preferred) or SAE 5W-30 for extreme cold.
Coolant Type:
Mopar Antifreeze/Coolant (Blue) or equivalent HOAT coolant.
Common Problems:
Leaking valve cover gaskets, cracking of the exhaust manifold (4.0L), transfer case chain stretch, differential leaks, and rust on the unibody/frame components.
Tread Lightly Recommendations:
Regularly inspect and service suspension components, driveline, and check for rust, especially in areas exposed to salt or moisture.
Legacy:
Jeep's long history of producing capable off-road vehicles dating back to WWII.
Tj Introduction:
The TJ generation replaced the YJ Wrangler in 1996, marking a significant return to the classic CJ styling and coil-spring suspension.
Tj Differences From Yj:
Introduction of coil springs instead of leaf springs, new interior design, improved powertrain options, and a return to round headlights.
Manufacturing Location:
Toledo, Ohio, USA
Production Years:
1996-2006 (TJ generation)
