Jeep Wrangler 1999 Factory Service Repair Manual

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🏷️ Basic Information Identification Make: Jeep Model: Wrangler Year: 1999 Codes Chassis Code: TJ Vin Digit Engine Code: G (4.0L) 👋 Introduction Market Position Segment: Compact SUV / Off-Road Vehicle...

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标签: 1999 Car Cars Jeep Misc Wrangler

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Description

🏷️ Basic Information

Identification

Make:

Model:

Wrangler

Year:

Codes

Chassis Code:

Vin Digit Engine Code:

G (4.0L)

👋 Introduction

Market Position

Segment:

Compact SUV / Off-Road Vehicle

Target Audience:

Off-road enthusiasts, Jeep owners seeking to perform their own maintenance and repairs, automotive repair shops.

Competitive Analysis

Competitors:

Toyota 4Runner, Ford Bronco, Chevrolet Tracker, Suzuki Samurai.

Key Differentiators:

Renowned off-road capability, iconic design, solid front axle (though TJ introduced a coil-sprung short-arm suspension, retaining excellent articulation), robust powertrain options.

Key Features

Off Road Design:

Short wheelbase, high ground clearance, available locking differentials (optional), robust transfer case, strong chassis.

Durability:

Engineered for rugged use and demanding environments.

Iconic Styling:

Round headlights, seven-slot grille, fold-down windshield, removable doors and top contribute to its distinctive appearance.

📋 Manual Details

Coverage Areas

Primary Coverage:

1999 Jeep Wrangler (TJ)

Secondary Coverage:

May include general TJ platform information applicable to adjacent model years.

Page Count

Estimated Page Count:

Approximately 1500-2000 pages (typical for comprehensive factory service manuals).

Manual Type

Type:

Factory Service Manual / Repair Manual

Language

Language:

English

Format

Format:

Digital (PDF)

📖 Manual Coverage

Systems Covered

Engine:

4.0L (242ci) Inline-6 (MPI), including diagnostics, disassembly, assembly, and specifications.

Transmission:

AX-15 (5-speed manual), NV3550 (5-speed manual), and 30/42LE (4-speed automatic) transmissions. Includes overhaul, diagnostics, and fluid specifications.

Drivetrain:

Front and rear axle assemblies (Dana 30 front, Dana 35c rear), NP231 Command-Trac transfer case. Includes service procedures for gears, bearings, seals, and CV joints.

Suspension:

Front and rear coil spring suspension, shock absorbers, sway bars, control arms, and steering linkage. Includes alignment specifications.

Brakes:

Front disc and rear drum brakes. Includes ABS system (if equipped), hydraulic components, and service procedures.

Steering:

Power steering system, steering column, and steering gear. Includes diagnostics and component replacement.

Electrical:

Complete wiring diagrams for all vehicle systems, fuse box layouts, component testing, ECM/PCM diagnostics, sensor testing, and starter/alternator service.

HVAC:

Heating, ventilation, and air conditioning systems. Includes component removal, recharging procedures, and troubleshooting.

Body:

Body panels, doors, hood, tailgate, interior trim, seats, bumpers, and convertible top. Includes body repair and alignment.

Frame:

Frame inspection, repair, and straightening procedures.

Procedures Included

Routine Maintenance:

Oil changes, filter replacements, fluid checks and changes, spark plug replacement, air filter service, belt inspection/replacement.

Troubleshooting:

Diagnostic procedures for common drivability issues, electrical faults, and mechanical failures, including symptom-based troubleshooting charts.

Component Repair:

Detailed step-by-step instructions for removing, overhauling, repairing, and installing all major vehicle components.

Diagnostics:

On-board diagnostics (OBD-II) system interpretation, DTC (Diagnostic Trouble Code) retrieval and clearing, live data analysis.

Technical Depth

Depth:

Comprehensive from basic maintenance to complete engine and transmission rebuilds, including detailed electrical system diagnostics and chassis component overhaul.

Diagnostic Tools:

Mentions use of specialized diagnostic tools and equipment where applicable, like scan tools and multimeter usage.

📊 Manual Specifications

File Format

Format:

Searchable:

Yes, text-searchable PDF for efficient information retrieval.

Printable:

Yes, pages are printable for workshop use.

Print Quality

Quality:

High-resolution digital reproduction of original factory documentation, ensuring clarity of text and diagrams.

Binding Type

Binding:

N/A (Digital PDF)

Paper Type

Paper Type:

N/A (Digital PDF)

⚙️ Engine Specifications

Primary Engine

Engine Type:

Inline 6-Cylinder, Overhead Valve (OHV)

Displacement:

4.0 Liters (242 cubic inches)

Bore X Stroke:

3.875 x 3.580 inches

Compression Ratio:

8.8:1

Fuel Delivery:

Multi-Point Fuel Injection (MPI), Sequential Electronic Fuel Injection

Ignition System:

Distributorless Ignition System (DIS) with coil-on-plug (for some later TJ models, but 1999 likely uses distributor).

Horsepower Gross:

182 hp @ 4,600 rpm

Torque Gross:

220 lb-ft @ 3,200 rpm

Performance

Engine Oil Type:

SAE 10W-30 (API SG or higher)

Engine Oil Capacity:

5.0 quarts (4.7 liters) with filter

Fuel System

Fuel Type:

Unleaded Gasoline (87 octane minimum recommended)

🔧 Transmission

Standard

Transmission Type:

AX-15 5-Speed Manual Transmission

Optional

Transmission Type:

30/42LE 4-Speed Automatic Transmission

Features

Transfer Case:

New Process (NP) 231 Command-Trac (Part-time, 2WD High, 4WD High, Neutral, 4WD Low)

Manual Transmission Fluid:

AX-15: Mopar Manual Transmission Lubricant (or equivalent meeting MS-9224 specification)

Automatic Transmission Fluid:

30/42LE: ATF+4 (MS-9602) or equivalent, DEXRON-III compatible

Transfer Case Fluid:

Mopar NV231 Heavy Duty Lubricant (or equivalent meeting MS-9224 specification)

📐 Dimensions

Exterior

Wheelbase:

93.4 inches (2372 mm)

Length:

150.7 inches (3828 mm)

Width:

66.5 inches (1689 mm)

Height:

70.0 inches (1778 mm)

Ground Clearance:

Approx. 8.7 inches (221 mm)

Weights

Curb Weight:

Approx. 3,400 - 3,700 lbs (1542 - 1678 kg), depending on configuration.

Gross Vehicle Weight Rating Gvwr:

Approx. 4,700 - 4,900 lbs (2132 - 2223 kg)

Cargo

Cargo Volume Behind Rear Seat:

Approx. 13.3 cu ft (0.377 m³)

Cargo Volume With Rear Seat Folded:

Approx. 37.5 cu ft (1.062 m³)

🛡️ Safety Features

Ratings

NHTSA Rollover Resistance:

Four-star rating (subject to specific test conditions and configurations).

Active Features

Anti-lock Braking System (ABS) - Standard on rear wheels, optional on front wheels for 1999 model year depending on trim and drivetrain.

Passive Features

Airbags:

Driver and passenger front airbags.

Seatbelts:

Three-point front seat belts with pretensioners, two-point rear seat belts.

Roll Cage:

Integral sport cage with built-in seat belt anchors for enhanced occupant protection during rollovers.

💡 Technology Features

Infotainment

Audio System:

Factory AM/FM radio with cassette player. Optional CD player.

Speakers:

Typically 4 speakers (2 front, 2 rear roll bar).

Driver Assistance

Available Anti-lock Braking System (ABS).

Connectivity

Connectivity Features:

Limited by era; primarily basic audio system connectivity. No Bluetooth or advanced telematics.

🔧 Maintenance

Service Intervals

Oil Change Interval:

Every 3,000 miles or 3 months (under normal driving conditions). Consult manual for severe service intervals.

Air Filter Replacement:

Inspect every 15,000 miles, replace as needed or every 30,000 miles. More frequently in dusty conditions.

Spark Plug Replacement:

Approx. 100,000 miles for platinum-tipped spark plugs (if equipped). Consult manual for original equipment.

Coolant Flush:

Every 2 years or 30,000 miles. Consult manual for specific coolant type and capacity.

Fluid Specifications

Engine Coolant:

Mopar Antifreeze/Coolant (50/50 mix with distilled water) - Meets Chrysler MS-9769 specification.

Brake Fluid:

DOT 3

Power Steering Fluid:

Mopar Power Steering Fluid (or equivalent meeting MS-5934A specification)

Known Issues

Common Wear Items:

Water pump, alternator, radiator, clutch components (manual transmission), U-joints, exhaust system, sway bar links, and track bar bushings.

Track Bar Issues:

Wear in the track bar and its bushings can lead to steering looseness and wandering.

Oil Filter Housing Leaks:

Common for the 4.0L engine to develop leaks from the oil filter housing gasket.

📚 Vehicle History

Brand Heritage

Jeep Legacy:

Direct descendant of the original Willys-Jeep, symbolizing ruggedness and off-road prowess since World War II.

Model Evolution

Tj Generation Start:

Introduced for the 1997 model year, replacing the YJ Wrangler.

Tj Key Innovations:

Return to round headlights (heritage design), introduction of coil spring suspension for improved ride quality and articulation, elimination of leaf springs.

1999 Updates:

Minor refinements may have occurred, but major changes were often introduced in later model years of the TJ generation.

Production

Production Location:

Toledo, Ohio, USA

Production Years Tj:

1997-2006

🏆 Awards & Recognition

Recognitions

Off Road Awards:

Jeep Wrangler consistently recognized as a benchmark for off-road capability by automotive publications and enthusiasts.

Ratings

Consumer Reports Ratings:

Varies by model year and specific issues reported; often praised for capability, criticized for road manners and interior noise.

Certifications

Manual Certification:

Represents official factory dealer service information, ensuring accuracy and compliance with manufacturer standards.