Engine:
        
        
            All engine variants, including troubleshooting, diagnostics, repair, and overhaul.
        
     
    
        
            Transmission:
        
        
            Manual and Automatic transmission systems: removal, installation, overhaul, and troubleshooting.
        
     
    
        
            Drivetrain:
        
        
            Transfer case, axles (Dana 30 front, Dana 35 rear standard, Dana 44 optional), driveshafts, CV joints, and wheel bearings.
        
     
    
        
            Suspension:
        
        
            Front and rear suspension components, including springs (coil springs standard), shock absorbers, control arms, sway bars, and steering linkages.
        
     
    
        
            Steering:
        
        
            Power steering system: pump, hoses, steering gear, and troubleshooting.
        
     
    
        
            Brakes:
        
        
            Front and rear brake systems (disc front, drum rear standard, optional discs rear): hydraulic system, calipers, pads, rotors, lines, and ABS.
        
     
    
        
            Electrical:
        
        
            Complete electrical system: wiring diagrams, charging system, starting system, ignition system, lighting, instruments, and accessories.
        
     
    
        
            Body And Chassis:
        
        
            Body construction, frame, doors, hood, tailgate, fenders, bumpers, interior trim, seats, and convertible top system.
        
     
    
        
            Heating And Cooling:
        
        
            HVAC system: A/C, heater core, blower motor, controls, and refrigerant servicing.
        
     
    
        
            Fuel System:
        
        
            Fuel tank, fuel pump, fuel injectors, fuel filter, and evaporative emissions system.
        
     
    
        
            Exhaust System:
        
        
            Exhaust manifold, catalytic converter, muffler, and pipes.
        
     
    
    
        
            Preventive Maintenance:
        
        
            Scheduled maintenance, fluid changes, filter replacements, inspections, lubrication.
        
     
    
        
            Troubleshooting:
        
        
            Diagnostic charts and procedures for common and uncommon issues across all systems.
        
     
    
        
            Repair And Rebuild:
        
        
            Step-by-step instructions for component removal, disassembly, repair, reassembly, and installation.
        
     
    
        
            Adjustments:
        
        
            Engine tuning, brake adjustments, clutch adjustments, steering alignment procedures.
        
     
    
        
            Diagnostics:
        
        
            OBD-II system diagnostics, sensor testing, component testing, fault code interpretation.
        
     
    
        
            Wiring Diagrams:
        
        
            Detailed color-coded wiring schematics for all electrical systems.
        
     
    
    
        
            Depth:
        
        
            Comprehensive, covering basic maintenance to full engine and transmission rebuilds. Includes diagnostic procedures and specifications.
        
     
 
    
    
    
        
            Wheelbase Short Wheelbase:
        
        
            93.4 inches (2372 mm)
        
     
    
        
            Wheelbase Long Wheelbase:
        
        
            103.4 inches (2626 mm) - Rubicon Unlimited / LJ
        
     
    
        
            Overall Length Short Wheelbase:
        
        
            151.7 inches (3853 mm)
        
     
    
        
            Overall Width:
        
        
            66.7 inches (1694 mm)
        
     
    
        
            Overall Height:
        
        
            71.5 inches (1816 mm)
        
     
    
    
        
            Curb Weight Est Short Wheelbase:
        
        
            3,500 - 3,800 lbs (1588 - 1724 kg)
        
     
    
        
            Gross Vehicle Weight Rating Gvwr Est:
        
        
            4,500 - 4,800 lbs (2041 - 2177 kg)
        
     
 
    
    
    
        
            Oil Change Interval Miles:
        
        
            3,000 - 5,000 miles (depending on driving conditions)
        
     
    
        
            Transmission Fluid Change Auto Miles:
        
        
            60,000 - 100,000 miles (ATF+4 is a long-life fluid)
        
     
    
        
            Transmission Fluid Change Manual Miles:
        
        
            60,000 - 100,000 miles
        
     
    
        
            Transfer Case Fluid Change Miles:
        
        
            60,000 - 100,000 miles
        
     
    
        
            Coolant Flush Miles:
        
        
            Every 5 years or 100,000 miles
        
     
    
    
        
            Engine Oil Spec:
        
        
            API Certified SAE 10W-30 (for 4.0L I6)
        
     
    
        
            Engine Oil Capacity Quarts:
        
        
            6.0 quarts (5.7 liters) with filter (4.0L I6)
        
     
    
        
            Coolant Type:
        
        
            Mopar Antifreeze/Coolant (5/150 Formula) or equivalent (typically HOAT orange/pink)
        
     
    
    
    
        
            Common Wear Items:
        
        
            U-joints, ball joints, tie rod ends, clutch wear (manual transmission), water pump seals, radiator leaks.
        
     
    
        
            Engine Specific Concerns:
        
        
            Cracking cylinder heads (early 4.0L I6 models, though less common on TJ than XJ), rear main seal leaks, tappet noise.
        
     
    
        
            Transmission Specific Concerns:
        
        
            42RLE harsh shifting, potential torque converter issues. NV3550 generally robust but clutch wear.
        
     
    
        
            Chassis Corrosion:
        
        
            Frame rust, particularly around rear spring perches and fuel tank mounts, common in rust-belt regions.