Vehicle Segment:
Compact SUV / Off-road Vehicle
Target Audience:
Off-road enthusiasts, outdoor adventurers, individuals seeking a rugged and reliable SUV
Key Competitors:
Toyota 4Runner, Nissan Pathfinder, Ford Bronco (earlier generations), Chevrolet S-10 Blazer
Powertrain Durability:
Renowned for the robust and durable 4.0L "60 Degree" Straight-Six engine
Off Road Capability:
Excellent articulation and ground clearance, often modified for serious off-roading
Compact Size:
Maneuverable in tight spaces, both on and off-road
Simplicity Reliability:
Mechanical simplicity contributes to its reputation for reliability and ease of maintenance
Powertrain:
Engine (4.0L I6), Fuel System, Exhaust System, Cooling System, Ignition System, Starting System, Charging System
Transmission Drivetrain:
Manual Transmissions (AX-5, NV1500), Automatic Transmissions (AW4, 30RH), Transfer Cases (NP231, NP242), Axles (Dana 30 Front, Dana 35 Rear), Driveshafts, CV Joints, Wheel Hubs
Chassis Suspension:
Front Suspension (Solid Leaf Spring, Coil Spring Conversion), Rear Suspension (Leaf Spring), Steering System, Brakes (ABS Optional), Wheel Bearings
Electrical Electronics:
Body Electrical, Engine Control Module (ECM) Wiring, Powertrain Control Module (PCM) Wiring, Instrument Cluster, Lighting, Horn, Wiper/Washer System, Audio System
Body Interior:
Body Panels, Doors, Glass, Seats, Interior Trim, HVAC System, Door Locks, Power Windows, Mirrors
Routine Maintenance:
Oil Changes, Filter Replacements, Fluid Checks and Top-offs, Spark Plug Replacement, Belt Inspection and Replacement
Diagnostic Troubleshooting:
Systematic diagnostic procedures for all major vehicle systems, including error code interpretation and testing
Repair Rebuild:
Detailed step-by-step instructions for component removal, disassembly, inspection, repair, and reassembly
Component Replacement:
Replacement procedures for engine components, transmission, axles, brakes, suspension parts, electrical units, and body components
Technical Specifications:
Torque specifications, clearances, fluid capacities, wiring diagrams, schematics, and component data
Depth Of Coverage:
Comprehensive, from basic maintenance to full engine and transmission rebuilds
Diagnostic Tools:
Information on necessary diagnostic tools, including OBD-II scanners and specialized test equipment
Troubleshooting Charts:
Extensive troubleshooting flowcharts based on symptoms
Special Tools:
Identification and use of special tools required for specific repairs
Recalibration Procedures:
Procedures for recalibration of sensitive electronic modules where applicable
Engine Type:
4.0L Inline-6 SOHC (242 ci)
Bore X Stroke:
3.88 in x 3.57 in (98.5 mm x 90.5 mm)
Horsepower Rating:
182 hp @ 4,400 rpm
Torque Rating:
220 lb-ft @ 3,200 rpm
Fuel Delivery:
Multi-port Electronic Fuel Injection (MPI)
Fuel Type:
Unleaded Gasoline (87 octane recommended)
Fuel Tank Capacity:
20.0 gal (75.7 L)
Coolant Type:
Mopar Antifreeze/Coolant (OAT or HOAT)
Oil Type:
SAE 10W-30 API SG or higher
Oil Capacity:
5.0 US qt (4.7 L) with filter
Transmission Type Standard:
4-Speed Automatic (AW4)
Transmission Type Optional:
5-Speed Manual (NV1500)
Automatic Transmission Fluid:
ATF+4 (Chrysler Mopar Specification)
Manual Transmission Fluid:
AX-5: GL-3 or GL-4 (80W-90) | NV1500: GL-5 (75W-90)
Transfer Case Options:
Selec-Trac (NP242) or Command-Trac (NP231)
NHTSA Frontal Impact Driver:
4 Stars (1999 Model Year)
NHTSA Frontal Impact Passenger:
4 Stars (1999 Model Year)
IIHS Side Impact:
Acceptable (1999 Model Year, varies by specific configuration)
ABS:
Optional (Rear-wheel ABS or 4-wheel ABS on select models)
Airbags:
Driver and Passenger Frontal Airbags
Seatbelts:
3-point front seatbelts with pretensioners, 3-point rear seatbelts
Oil Change Interval:
Every 3,000-5,000 miles or 3-6 months (depending on driving conditions)
Engine Coolant Flush:
Every 30,000 miles or 24 months
Transmission Fluid Change:
Every 30,000-50,000 miles (for automatic, manual depends on usage)
Spark Plug Replacement:
Every 60,000-100,000 miles (depending on plug type)
Power Steering Fluid:
ATF+3 or ATF+4
Transfer Case Fluid:
ATF+4 (NP231, NP242)
Cracked Cylinder Head:
While the 4.0L is robust, early models were prone to cylinder head cracking, though less common in later years like 1999. Manual covers inspection and replacement.
Radiator Failure:
Plastic end tanks can degrade over time. Manual covers replacement procedure.
Driver Side Lower Control Arm Bushings:
Wear can cause alignment issues. Manual details inspection and replacement.
Evaporative Emissions System Leaks:
Can cause check engine lights. Manual provides diagnostic steps.