Segment:
Compact SUV / Off-road Vehicle
Target Audience:
Off-road enthusiasts, outdoor adventurers, and owners seeking robust, utilitarian vehicles.
Key Competitors 1998:
Toyota Land Cruiser (Prado), Nissan Pathfinder, Chevrolet Tracker, Suzuki Vitara, Ford Bronco.
Iconic Design:
Renowned for its rugged, body-on-frame construction, solid axles (front and rear), and distinctive seven-slot grille.
Off Road Capability:
Class-leading off-road prowess due to its short wheelbase, approach/departure angles, ground clearance, and available 4x4 systems (Command-Trac NP231).
Customization:
Highly customizable with a vast aftermarket support for modifications and upgrades.
General Coverage:
Comprehensive factory service and repair information for the 1998 Jeep Wrangler.
Specific Models Covered:
All 1998 Jeep Wrangler models (TJ generation).
Estimated Page Count:
Over 1500 pages (estimated for a complete factory service manual of this era and scope).
Type:
Factory Service Repair Workshop Manual
Format:
PDF (Digital Download)
Engine:
Detailed diagnosis, repair, and overhaul procedures for all engine variants.
Transmission:
Service and repair for manual and automatic transmissions.
Drivetrain:
Four-wheel-drive system (NV231 transfer case), axles (Dana 30 front, Dana 35c rear), drivelines, and differentials.
Suspension:
Front and rear suspension components, springs, shocks, bushings, alignment specifications.
Brakes:
Front and rear brake systems (disc/drum configuration), ABS (if equipped), hydraulic system, parking brake.
Steering:
Power steering system, steering gear, tie rods, steering column.
Electrical:
Complete wiring diagrams, component testing, diagnostic procedures for lighting, ignition, starting, charging, body electrical, and instrument cluster.
HVAC:
Heating, Ventilation, and Air Conditioning system diagnosis and repair.
Body:
Body panel removal and installation, interior trim, convertible top service, chassis repair.
Diagnostics:
Diagnostic trouble codes (DTCs) and troubleshooting flowcharts for various systems.
Scheduled Maintenance:
Detailed maintenance schedules, fluid change intervals, and component inspection points.
Troubleshooting:
Systematic troubleshooting guides for common and uncommon faults.
Component Repair:
Step-by-step instructions for removal, disassembly, inspection, repair, and reassembly of all major components.
Torque Specifications:
Comprehensive list of torque specifications for all critical fasteners.
Special Tools:
Identification and usage instructions for specialized tools required for specific repairs.
Depth:
From basic fluid checks and filter replacements to complete engine and transmission overhauls and complex electrical diagnostics.
Searchability:
Searchable text within the PDF for quick access to information.
Quality:
High-resolution scans ensuring clear diagrams, schematics, and text.
Binding:
Not Applicable (Digital Download)
Paper:
Not Applicable (Digital Download)
Engine Type:
Inline 6-Cylinder, SOHC
Displacement:
3957 cc (242 cubic inches)
Bore X Stroke:
3.875 in x 3.562 in (98.4 mm x 90.5 mm)
Compression Ratio:
8.25:1
Horsepower:
181 hp @ 4600 RPM
Torque:
220 lb-ft @ 3000 RPM
0 60 Mph Approx:
9.5 - 10.5 seconds (depending on transmission and configuration)
Fuel Delivery:
Sequential Multi-Port Fuel Injection (MPI)
Fuel Type:
Unleaded Gasoline
Recommended Octane:
87 Octane
Engine Option 2:
2.5L (150 cu in) 4-cylinder (less common in 1998, but possible).
Transmission Type Standard:
NV3550 5-Speed Manual Transmission
Transmission Type Optional:
42RLE 4-Speed Automatic Transmission
Transfer Case:
New Process NP231 Command-Trac NV231HD (part-time, 2WD High, 4WD High, 4WD Low engagement)
Manual Transmission Fluid:
API GL-3 or GL-4, SAE 75W-90 (e.g., Mopar Manual Transmission Lubricant)
Automatic Transmission Fluid:
Chrysler ATF+4 (or equivalent specification like ATF-3, but +4 is preferred for longevity)
Manual Transmission Capacity:
Approx. 2.1 Quarts (2.0 Liters)
Automatic Transmission Capacity:
Approx. 8.5 Quarts (8.0 Liters) (dry fill)
Transfer Case Capacity:
Approx. 1.9 Quarts (1.8 Liters) (Mopar NV231/NP231 Heavy Duty Transfer Case Fluid)
Wheelbase:
93.4 inches (2372 mm)
Length:
151.4 inches (3845 mm)
Width:
66.7 inches (1694 mm)
Height:
71.5 inches (1816 mm)
Ground Clearance:
Approx. 8.3 - 9.5 inches (211 - 241 mm) (depending on tire size)
Cargo Volume Behind Rear Seat:
Approx. 12.4 cu ft (351 L)
Cargo Volume With Rear Seat Folded:
Approx. 41.5 cu ft (1175 L)
Curb Weight Approx:
3310 - 3500 lbs (1501 - 1588 kg) (depending on configuration)
Gross Vehicle Weight Rating Gvw:
Approx. 4600 - 4800 lbs (2087 - 2177 kg)
Towing Capacity Max:
2000 lbs (907 kg)
Payload Capacity Max:
Approx. 1100 - 1300 lbs (499 - 590 kg)
NHTSA Rollover Rating Approx:
3-star (typical for vehicles of this era and design)
ABS:
Optional Anti-lock Braking System (ABS) on front wheels, rear wheels standard.
Airbags:
Driver and Passenger Frontal Airbags
Rollover Protection:
Integral roll cage and sport bar for enhanced occupant protection in rollover events.
Seatbelts:
Three-point front seat belts, lap belts for rear passengers.
Audio System:
Basic AM/FM stereo with cassette player, optional CD player. Speaker configuration typically 2 or 4 speakers.
Anti Theft:
Optional factory alarm system.
Bluetooth:
Not available from factory.
Usb Ports:
Not available from factory.
Oil Change Interval:
Every 3,000 - 7,500 miles (5,000 - 12,000 km) or 6 months, depending on driving conditions and oil type (refer to manual for specifics).
Engine Coolant Flush:
Every 30,000 miles (48,000 km) or 2-3 years.
Transmission Fluid Change:
Manual: Every 30,000 - 60,000 miles (48,000 - 96,000 km). Automatic: Every 30,000 - 50,000 miles (48,000 - 80,000 km).
Spark Plug Replacement:
Approx. 100,000 miles (160,000 km) for original equipment spark plugs (e.g., Champion).
Transfer Case Fluid Change:
Every 30,000 - 60,000 miles (48,000 - 96,000 km).
Engine Oil Type:
API SG or SH rated, SAE 10W-30 or 10W-40 (check owner's manual for specific climate recommendations)
Engine Oil Capacity:
6 US quarts (5.7 Liters) with filter change.
Coolant Type:
Ethylene Glycol based antifreeze (Mopar Antifreeze/Coolant 10 Year/100,000 Mile Formula, or equivalent meeting Chrysler MS-9769 specification).
Power Steering Fluid Type:
ATF+3 or ATF+4 (Chrysler spec MS-9229 or MS-7176)
Common Wear Item Steering Box:
Steering box wear leading to looseness and play.
Common Wear Item Water Pump:
Water pump seal leaks are relatively common.
Common Wear Item Clutch Throwout Bearing:
Throwout bearing in manual transmissions can fail prematurely.
Common Wear Item Frame Rust:
Frame rust, particularly around the rear axle and body mounts, requires diligent inspection and potential remediation.
Common Wear Item Track Bar Bushings:
Wear in the track bar bushings can lead to wandering steering.
Jeep Legacy:
Jeep's lineage traces back to World War II, establishing a reputation for robust, go-anywhere capability.
Tj Generation Launch:
The TJ generation was introduced for the 1997 model year, succeeding the YJ Wrangler.
Tj Distinguishing Features:
Key improvements over the YJ included the return to round headlights, coil spring suspension for improved ride comfort and articulation, and a more refined interior.
Manufacturing Location:
Toledo, Ohio, USA
Production Period For Tj:
1996/1997 - 2006
Off Road Magazine Awards:
Consistently recognized by off-road publications for its capability and design.
Consumer Satisfaction:
Generally high owner satisfaction, particularly among enthusiasts who value its off-road performance and iconic styling.
Emissions Certification:
Meets all applicable federal emissions standards for 1998.