Engine Mechanical:
Complete overhaul procedures, diagnostics, component testing, lubrication, cooling, fuel, exhaust
Engine Electrical:
Ignition system, starting system, charging system, engine control module (ECM), sensor diagnostics, wiring diagrams
Transmission Manual:
Clutch system, gearshift linkage, internal components, maintenance, repair, fluid specifications
Transmission Automatic:
Torque converter, hydraulic system, internal components, maintenance, repair, fluid specifications, diagnostic codes
Drivetrain 4X4:
Transfer case operation and repair, front and rear drive shafts, U-joints, axle housings, differential service
Suspension:
Front and rear suspension components, coil springs, shock absorbers, control arms, bushings, alignment specifications
Steering:
Steering column, steering gear, power steering system, pump, hoses, linkages, diagnostics
Brakes:
Front and rear brake systems (disc/drum), hydraulic lines, master cylinder, calipers, wheel cylinders, parking brake, ABS (if equipped), bleeding procedures
Body And Frame:
Body panel removal and installation, interior trim, doors, hood, tailgate, frame inspection and repair, rust prevention
Electrical System:
Lighting system, charging system, starting system, instrument cluster, body control module, power windows, door locks, wipers, horn, battery, fuse box diagrams, wiring schematics
HVAC:
Heating, ventilation, and air conditioning (HVAC) system operation, component testing, refrigerant handling, leak detection, blower motor, heater core, A/C compressor
Emissions Control:
Evaporative emissions (EVAP) system, exhaust gas recirculation (EGR), catalytic converter, emission control sensors, diagnostic trouble codes (DTCs)
Maintenance:
Scheduled maintenance intervals, fluid level checks, filter replacements, lubrication points, tune-up procedures
Troubleshooting:
Diagnostic flowcharts, common problems and solutions, symptom-based troubleshooting, DTC interpretation
Repair:
Step-by-step repair instructions for all major vehicle systems, including disassembly, component replacement, reassembly, and adjustments
Diagnostics:
On-board diagnostics (OBD-II) system, diagnostic trouble code (DTC) listing and interpretation, scan tool usage, sensor testing procedures
Specifications:
Torque specifications for fasteners, fluid capacities, electrical specifications, measurement tolerances
Wiring Diagrams:
Comprehensive electrical wiring diagrams for all vehicle circuits, color-coded tracing
Depth:
Comprehensive (from basic maintenance to full engine/transmission rebuilds)
Engine Type:
Inline 6-cylinder, Overhead Valve (OHV)
Engine Code:
4.0L (242 ci) - 'Select-Shift'
Displacement:
3957 cc (4.0 Liters)
Bore X Stroke:
3.88 in x 3.41 in (98.5 mm x 86.7 mm)
Horsepower:
181 hp @ 4,750 rpm
Torque:
220 lb-ft @ 4,000 rpm
Fuel Delivery:
Sequential Multi-Port Fuel Injection (MPI)
Fuel Type:
Unleaded Gasoline
Fuel Octane Rating:
87 Octane (Recommended)
Cooling System Type:
Pressurized Liquid Cooling
Coolant Type:
Chrysler/Dodge/Jeep Long Life Antifreeze/Coolant (50/50 mix with distilled water)
Coolant Capacity:
12.1 US quarts (11.4 Liters)
Thermostat Rating:
195°F (90.5°C)
Oil Type:
SAE 10W-30 API Certified
Oil Capacity:
5 US quarts (4.7 Liters) with filter
Oil Filter Part Number:
Mopar: 53020612, Fram: PH8A, Wix: 51085
Transmission Type:
Manual Transmission
Transmission Model:
AX-15 (4.0L engine)
Gears:
5-speed forward, 1-speed reverse
Transmission Fluid Type:
Dexron III or equivalent Automatic Transmission Fluid (ATF) for the AX-15. Manual Trans: Mopar Manual Transmission Lubricant or equivalent.
Transmission Type:
Automatic Transmission
Transmission Model:
42RLE (Later model TJ, but 4-speed 32RH likely for '97 with 4.0L)
Gears:
3-speed forward, 1-speed reverse (32RH)
Transmission Fluid Type:
Chrysler ATF+4 (for 42RLE), ATF+3 (for 32RH)
Transfer Case:
NV231 Command-Trac (2WD High, N, 4WD High, 4WD Low)
Transfer Case Fluid Type:
Mopar NV231 Transfer Case Lubricant or equivalent
Transfer Case Fluid Capacity:
1.7 US quarts (1.6 Liters)
Oil Change Interval:
Every 3,000 miles or 3 months (traditional) / 7,500 miles or 6 months (synthetic oil, depending on driving conditions)
Tire Rotation Interval:
Every 5,000-7,500 miles
Transmission Fluid Change:
Manual: Inspect annually, change as needed / Automatic: Every 30,000-60,000 miles or as per severe service schedule
Transfer Case Fluid Change:
Every 30,000 miles
Power Steering Fluid:
ATF+3 or equivalent
Common Problems Engine:
Oil filter adapter O-ring leaks, rear main seal leaks, distributor O-ring leaks, head gasket issues (less common on 4.0L compared to some other Chrysler engines), catalytic converter failure.
Common Problems Transmission:
Clutch wear (manual), input shaft seal leaks, bearing noise (manual), valve body issues (automatic).
Common Problems Suspension Steering:
Worn ball joints, worn control arm bushings, steering box wear, track bar issues (if equipped), death wobble (can be caused by multiple worn suspension components).
Common Problems Electrical:
Window motor failure, alternator issues, PCM (Powertrain Control Module) failure, bad grounds.
U Joint Replacement:
Frequent replacement due to off-road use and potential wear.
Radiator Replacement:
Can be prone to clogging or leaks over time.