Segment:
Compact SUV / Off-road vehicle
Target Audience:
Jeep enthusiasts, DIY mechanics, professional repair shops, collectors.
Key Competitors 1994:
Ford Explorer, Chevrolet Blazer, Toyota 4Runner, Nissan Pathfinder.
Design Philosophy:
Robust, capable off-road platform with a utilitarian and iconic design.
Manual Advantage:
Unparalleled detail, factory accuracy, and comprehensive coverage for all maintenance and repair needs.
Engine Mechanical:
Full overhaul and repair of 4.0L I6 and 2.5L I4 engines, including lubrication, cooling, fuel, and emission control systems.
Engine Electrical:
Ignition system, starting system, charging system, engine sensors, powertrain control module (PCM) diagnostics and wiring diagrams.
Transmission Manual:
NV242 Selec-Trac and NV249 Command-Trac transfer cases, clutch system, manual transmission (AX-5, AX-15) repair and overhaul.
Transmission Automatic:
42RE and 32RH automatic transmissions: service, repair, overhaul, hydraulic control, and torque converter.
Drivetrain:
Front and rear axle assemblies (Dana 30/35), propeller shafts, U-joints, differential repair and adjustment.
Suspension:
Front and rear suspension components (leaf springs, coil springs, shock absorbers), steering linkage, power steering system.
Brakes:
Front disc brakes, rear drum brakes, parking brake system, hydraulic lines, master cylinder, power assist system.
Electrical System:
Complete vehicle wiring diagrams, lighting systems, instrument cluster, power accessories, body control modules.
Body Exterior:
Body panel removal and installation, doors, hood, tailgate, glass, bumpers, trim components, frame and unibody construction.
Body Interior:
Seating systems, dashboard assembly, interior trim panels, HVAC system (heater, A/C), sound insulation.
HVAC:
Air conditioning system service, refrigerant handling, heater core replacement, blower motor diagnostics.
Fuel System:
Fuel tank, fuel pump, fuel filter, fuel injectors, fuel pressure regulator, evaporative emission control (EVAP).
Exhaust System:
Exhaust manifold, catalytic converter, muffler, tailpipe, oxygen sensors.
Basic Maintenance:
Oil changes, filter replacements, fluid checks and top-offs, tire rotation, spark plug replacement.
Troubleshooting:
Diagnostic charts, symptom-based troubleshooting guides, electrical diagnostic procedures, component testing.
Repair:
Detailed step-by-step repair procedures for all major components and systems.
Overhaul:
Complete overhaul procedures for engines and transmissions.
Diagnostics:
OBD-I diagnostic codes and procedures, on-board diagnostics, sensor testing.
Installation:
Procedures for installing optional equipment and replacement parts.
Depth:
Comprehensive: Covers everything from routine maintenance to complete engine and transmission rebuilds.
Detail Level:
Detailed exploded views, torque specifications, diagnostic flowcharts, and electrical schematics.
Engine 1:
4.0L (3956cc) "High Output" Inline 6-Cylinder (OHV)
Engine 1 Bore X Stroke:
3.875" x 3.559" (98.4 mm x 90.4 mm)
Engine 1 Compression Ratio:
8.8:1
Engine 1 Horsepower:
180 hp @ 4750 rpm (approx.)
Engine 1 Torque:
220 lb-ft @ 3250 rpm (approx.)
Engine 2:
2.5L (2469cc) Inline 4-Cylinder (OHV)
Engine 2 Bore X Stroke:
3.88" x 3.375" (98.5 mm x 85.7 mm)
Engine 2 Compression Ratio:
8.8:1
Engine 2 Horsepower:
125 hp @ 4800 rpm (approx.)
Engine 2 Torque:
150 lb-ft @ 2400 rpm (approx.)
Fuel Delivery:
Multi-point Fuel Injection (MPI) for 4.0L; Throttle Body Injection (TBI) for 2.5L.
Fuel Type:
Unleaded gasoline (87 octane recommended)
Ignition Type:
Distributorless Ignition System (DIS) for 4.0L; Distributor with ignition coil for 2.5L.
Transmission Type Standard:
5-Speed Manual Transmission (AX-15 for 4.0L; AX-5 for 2.5L)
Transmission Type Optional:
4-Speed Automatic Transmission (42RE for 4.0L; 32RH for 2.5L)
Transfer Case Options:
NV242 Selec-Trac (2WD/4WD Full-Time); NV249 Command-Trac (Part-Time 4WD).
Manual Transmission Fluid:
ATF+3 or equivalent (AX-5, AX-15)
Automatic Transmission Fluid:
ATF+3 or equivalent (42RE, 32RH)
Transfer Case Fluid:
Mopar NV242 Transfer Case Lubricant or equivalent (NP242); Mopar NV249 Transfer Case Lubricant or equivalent (NP249).
Audio System:
AM/FM stereo with cassette player, optional CD player. Basic speaker systems.
Instrument Cluster:
Analog gauges for speed, tachometer, fuel, coolant temperature, oil pressure. Warning lights for various systems.
ABS:
Optional rear-wheel Anti-lock Braking System (ABS).
Connectivity Features:
None (basic vehicle; no integrated Bluetooth, USB, or infotainment systems).
Oil Change Interval:
Every 3,000 - 5,000 miles (4,800 - 8,000 km) or 6 months, whichever comes first.
Air Filter Replacement Interval:
Every 15,000 - 30,000 miles (24,000 - 48,000 km)
Spark Plug Replacement Interval:
Every 30,000 - 60,000 miles (48,000 - 96,000 km) depending on plug type.
Coolant Flush Interval:
Every 30,000 miles (48,000 km) or 2 years.
Engine Oil Specification:
API SN/SP, ILSAC GF-6A; SAE 10W-30 (preferred for 4.0L); SAE 10W-30 or 10W-40 (for 2.5L). Check owner's manual for precise viscosity by temperature.
Engine Oil Capacity:
4.0L: 5 US quarts (4.7 L) with filter; 2.5L: 4 US quarts (3.8 L) with filter.
Coolant Specification:
Mopar Antifreeze/Coolant (HOAT) or equivalent; 50/50 mix with distilled water.
Brake Fluid Specification:
DOT 3
Common Issue 1:
Head gasket leaks (especially on early 4.0L models, though 1994 is generally more robust).
Common Issue 2:
Cracked cylinder heads (4.0L engine - monitor temperature).
Common Issue 3:
Rusty unibody structure, particularly in the rocker panels and rear quarter panels. Check wheel wells and floor pans.
Common Issue 4:
Transmission cooler line leaks (leading to transmission failure).
Common Issue 5:
Leaf spring U-bolt loosening or breakage.
Common Issue 6:
Cracked exhaust manifolds (4.0L).
Common Issue 7:
Worn steering components (tie rod ends, ball joints).