🏷️ Basic Information

Make:

Jeep

Model:

Wrangler

Generation Code:

TJ

Model Year:

1999

Chassis Code:

TJ

👋 Introduction

Segment:

Compact Sport Utility Vehicle (SUV) / Off-Road Vehicle

Target Audience:

Off-road enthusiasts, DIY mechanics, Jeep owners seeking comprehensive service information

Key Competitors:

Toyota 4Runner, Ford Bronco (earlier generations), Suzuki Samurai

Unique Selling Proposition:

Renowned off-road capability, iconic design, strong aftermarket support, relatively simple mechanicals for the era

Design Philosophy:

Rugged, body-on-frame construction, solid axles, removable doors and roof for open-air experience

Durability Focus:

Engineered for extreme off-road conditions and long-term reliability

Diy Empowerment:

Enables owners to perform a wide range of maintenance and repair tasks, saving on labor costs and ensuring quality

📋 Manual Details

Primary Coverage:

Full Service, Repair, Maintenance, Troubleshooting, Diagnostics

Secondary Coverage:

Chassis, Drivetrain, Engine, Electrical, Body, HVAC, Emissions

Estimated Pages:

1000+

Type:

Service and Repair Manual

Scope:

Comprehensive Workshop Manual

Language:

English

Format:

Downloadable Digital Format (PDF)

Searchability:

Fully Searchable Text

Printability:

Printable Pages

📖 Manual Coverage

Powertrain:

Engine, Transmission (Manual & Automatic), Transfer Case, Axles, Drivelines

Chassis:

Suspension (Front & Rear), Steering, Brakes (Front & Rear), Wheels, Tires

Electrical:

Engine Control Module (ECM), Body Control Module (BCM), Lighting, Gauges, Instrumentation, Audio System, Power Accessories, Ignition System, Charging System, Starter System, SRS (Airbag) System

Body And Trim:

Body Panels, Doors, Windows, Seats, Interior Trim, Convertible Top, Bumpers, Exterior Trim

HVAC And Emissions:

Heating, Ventilation, Air Conditioning (HVAC), Evaporative Emission Control (EVAP), Exhaust System

Routine Maintenance:

Oil Changes, Filter Replacements, Fluid Checks and Top-offs, Tire Rotation, Wiper Blade Replacement

Engine Repairs:

Tune-ups, Spark Plug Replacement, Ignition Coil Replacement, Fuel Injector Service, Coolant System Service, Timing Belt/Chain Service (if applicable), Head Gasket Repair, Piston/Ring Replacement

Transmission And Drivetrain:

Clutch Service, Transmission Fluid Change, Transmission Rebuilds, Differential Service, CV Joint Replacement, Driveshaft Repair

Brake System:

Brake Pad Replacement, Rotor Replacement, Brake Caliper Service, Brake Fluid Flush, ABS System Troubleshooting

Suspension And Steering:

Shock Absorber/Strut Replacement, Ball Joint Replacement, Tie Rod End Replacement, Power Steering System Service

Electrical Diagnostics:

Wiring Diagrams, Component Testing, Sensor Diagnosis, Fault Code Retrieval and Interpretation

Bodywork And Interior:

Panel Replacement, Door Hinge Repair, Window Regulator Replacement, Seat Removal and Installation, Convertible Top Repair

Troubleshooting:

Diagnostic Flowcharts, Symptom-based Troubleshooting Guides

Depth:

Complete Professional Level (from basic maintenance to full engine and transmission rebuilds)

Diagnostics:

Advanced diagnostic procedures, including component testing and wiring schematics

Special Tools:

Identification and usage of specialized tools required for specific repairs

📊 Manual Specifications

Format:

PDF

Resolution:

High-resolution, suitable for clear viewing and printing

Compatibility:

Compatible with all major PDF readers and devices

Print Readability:

Designed for excellent print quality with clear diagrams and text

Binding:

N/A (Digital Download)

Paper Quality:

N/A (Digital Download)

⚙️ Engine Specifications

Engine Code:

4.0L Inline-6 (OHV) - AMC 242

Engine Type:

Naturally Aspirated, Overhead Valve (OHV)

Displacement:

3957 cc (242 cubic inches)

Horsepower Rating:

182 hp @ 4600 rpm

Torque Rating:

220 lb-ft @ 3000 rpm

Fuel Delivery:

Sequential Multi-Port Fuel Injection (MPI)

Fuel Type:

Unleaded Gasoline (87 Octane Recommended)

ECU:

Powertrain Control Module (PCM)

Coolant Type:

Mopar Antifreeze/Coolant 5/100 (Green, Ethylene Glycol Based) or equivalent

Oil Type:

SAE 10W-30 API Service SG or SH

Oil Capacity With Filter:

6.0 US Quarts (5.7 Liters)

🔧 Transmission

Transmission Type:

NV3550 5-Speed Manual Transmission

Transmission Type:

42RE 4-Speed Automatic Transmission

Transfer Case:

NV231 Command-Trac (Part-time, 2.72:1 low range)

Manual Transmission Fluid:

Mopar Manual Transmission Lubricant (or equivalent GL-3/GL-4 rated gear oil)

Automatic Transmission Fluid:

Mopar ATF+4 (MS-9602) or equivalent ATF specification

Transfer Case Fluid:

Mopar NV231 Transfer Case Lubricant (or equivalent SAE 75W-90 GL-5 gear oil)

📐 Dimensions

Wheelbase:

93.4 inches (2372 mm)

Length:

151.4 inches (3845 mm)

Width Body:

66.5 inches (1689 mm)

Height With Hardtop:

71.6 inches (1819 mm)

Curb Weight Approx:

3500-3800 lbs (1588-1724 kg) depending on configuration

Gross Vehicle Weight Rating Gvwr:

4950 lbs (2245 kg)

Standard Tire Size:

P215/75R15, LT215/75R15

Optional Tire Size:

P225/75R16, LT235/75R16

Bolt Pattern:

5x4.5 inches (5x114.3 mm)

Wheel Size:

15x8 inch or 16x7 inch

🛡️ Safety Features

NHTSA Rollover Rating:

N/A (Often not rated or rated lower due to inherent design)

ABS:

Optional Anti-lock Braking System (ABS) on rear wheels, or 4-wheel ABS

Airbags:

Driver and Passenger Airbags (SRS)

Seatbelts:

3-point inertia-reel seatbelts

Body Construction:

Body-on-frame construction with steel chassis and body tub

💡 Technology Features

Audio System:

AM/FM Stereo with Cassette Player standard, Optional CD Player

Speakers:

4-speaker system standard

ABS Availability:

Optional

Connectivity Features:

Basic connectivity for audio system, no integrated Bluetooth or USB for 1999 model

🔧 Maintenance

Engine Oil And Filter Change:

Every 3,000-5,000 miles or 3-6 months (depending on driving conditions, severe vs. normal)

Engine Air Filter Replacement:

Every 15,000-30,000 miles or annually

Spark Plug Replacement:

Approximately 100,000 miles for platinum-tipped plugs (if equipped), earlier for conventional

Coolant Flush And Replacement:

Every 30,000-50,000 miles or 2-3 years

Automatic Transmission Fluid Change:

Every 30,000-60,000 miles (depending on driving conditions)

Manual Transmission Fluid Change:

Every 60,000-100,000 miles

Transfer Case Fluid Change:

Every 60,000-100,000 miles

Differential Fluid Change:

Every 60,000-100,000 miles

Brake Fluid Flush:

Every 2-3 years or 30,000 miles

Power Steering Fluid:

Mopar Power Steering Fluid or DEXRON II/III Automatic Transmission Fluid

Common Problems:

Cracked exhaust manifolds (4.0L), oil filter adapter housing leaks, radiator leaks, rear main seal leaks, transmission clutch wear, steering box wear, front sway bar links wear, interior water leaks

Common Fixes:

Aftermarket exhaust headers, replacement of leaking seals/gaskets, cooling system overhaul, steering system overhaul, replacement of worn suspension components, sealant application for leaks

📚 Vehicle History

Jeep Legacy:

Direct descendant of the original Willys MB military Jeep of World War II

Tj Introduction:

Introduced for the 1997 model year, replacing the YJ Wrangler

Tj Distinguishing Features:

Return to round headlights, coil spring suspension (replacing YJ's leaf springs), redesigned interior and exterior styling

Tj Updates 1999:

Minor updates may include interior trim revisions, potential for minor feature packaging changes. 1999 was a transition year for some emissions components.

Production Period:

1997-2006

Manufacturing Plant:

Toledo Complex, Toledo, Ohio, USA

🏆 Awards & Recognition

Off Road Accolades:

Consistently recognized for its off-road prowess and capability by automotive publications and enthusiasts