Jeep CJ-7 1979 Service Repair Workshop Manual

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🏷️ Basic Information Identification Make: Jeep Model: CJ-7 Year: 1979 Codes Chassis Code: CJ-7 Production Code Prefix: J 👋 Introduction Market Position Vehicle Class: Compact SUV / Off-Road Vehicle Segment...

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标签: 1979 Car Cars CJ-7 Jeep Misc

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Description

🏷️ Basic Information

Identification

Make:

Model:

Year:

Codes

Chassis Code:

Production Code Prefix:

👋 Introduction

Market Position

Vehicle Class:

Compact SUV / Off-Road Vehicle

Segment Identity:

Iconic utility vehicle known for its ruggedness, off-road capability, and open-air driving experience.

Competitive Analysis

Key Competitors Era:

Land Rover Series III, International Harvester Scout II, Toyota Land Cruiser FJ40.

Key Features

Design Philosophy:

Body-on-frame construction, robust 4WD system, removable doors and top, and versatile off-road performance.

Target Audience:

Off-road enthusiasts, adventurers, and those seeking a durable, utilitarian vehicle.

Manual Value Proposition

Value For Owner:

Empowers owners and mechanics with the knowledge to maintain, diagnose, and repair the Jeep CJ-7 effectively, saving time and money on professional servicing.

📋 Manual Details

Coverage Areas

Engine:

Transmission:

Drivetrain:

Suspension:

Steering:

Brakes:

Electrical System:

Fuel System:

Cooling System:

Exhaust System:

Body And Frame:

Interior Components:

Heating And Air Conditioning:

Troubleshooting:

Diagnostics:

Wiring Diagrams:

Page Count

Estimated Pages:

Manual Type

Type:

Factory Service Manual / Workshop Manual

Language

Language:

English

Format

Format:

Digital (PDF)

📖 Manual Coverage

Systems Covered

Powertrain:

Comprehensive coverage of engine, transmission, transfer case, and axles.

Chassis And Suspension:

Detailed information on front and rear suspension, steering system, and chassis components.

Braking System:

In-depth explanation of hydraulic brake system, including disc and drum components, master cylinder, and parking brake.

Electrical And Lighting:

Extensive coverage of automotive electrical system, including battery, alternator, starter, ignition system, lighting, instrumentation, and all relevant wiring diagrams.

Body And Interior:

Covers body panel removal and installation, door mechanisms, seat adjustments, convertible top (if applicable), and interior trim.

Procedures Included

Routine Maintenance:

Oil changes, filter replacements, fluid checks and top-offs, lubrication points, and tune-up procedures.

Engine Overhaul:

Detailed step-by-step instructions for engine disassembly, inspection, repair, and reassembly for all engine variants.

Transmission Repair:

Complete guide to manual transmission (e.g., T-150, SR4, T-18) and automatic transmission (e.g., TH400) service, including clutch service.

Brake Service:

Brake pad/shoe replacement, rotor/drum machining or replacement, caliper/wheel cylinder overhaul, brake bleeding procedures.

Electrical Troubleshooting:

Step-by-step diagnostic procedures for common electrical faults, including fuse diagnostics, wiring harness checks, and component testing.

Suspension And Steering Repair:

Ball joint replacement, shock absorber installation, steering linkage service, power steering system repair.

Diagnostic Troubleshooting Flowcharts:

Organized flowcharts to guide technicians through identifying and resolving specific vehicle problems.

Technical Depth

Depth:

Comprehensive, covering all aspects from routine maintenance to complete engine and transmission rebuilds, including detailed electrical schematics and diagnostic procedures.

📊 Manual Specifications

File Format

Format Details:

High-resolution, searchable PDF document allowing for easy navigation and keyword searching.

Print Quality

Print Readability:

Excellent, with clear text and well-defined diagrams suitable for printing.

Binding Type

Digital Binding:

N/A (Digital Format)

Paper Type

Digital Paper Type:

N/A (Digital Format)

⚙️ Engine Specifications

Primary Engine

Engine Code:

AMC 258 (Inline-6)

Engine Type:

Overhead Valve (OHV) Inline-6 Cylinder

Displacement:

258 cubic inches (4.2 Liters)

Bore X Stroke:

3.75 in x 3.89 in (95.25 mm x 98.9 mm)

Compression Ratio:

8.0:1

Horsepower Net:

112 HP @ 3500 RPM

Torque Net:

207 lb-ft @ 2000 RPM

Optional Engine

Engine Code 2:

Jeep 4.2L (V8) - less common for '79 CJ-7, more often later models or conversions. However, the manual may cover it if it was an option.

Engine Type 2:

Overhead Valve (OHV) V8 Cylinder

Displacement 2:

304 cubic inches (5.0 Liters)

Horsepower Net 2:

125 HP @ 3200 RPM (approx.)

Torque Net 2:

240 lb-ft @ 2400 RPM (approx.)

Fuel System

Carburetor Primary:

Motorcraft 2100 2-barrel (or Rochester 2G)

Fuel Type:

Unleaded Regular Gasoline

Ignition System

Ignition Type:

Breaker Point Ignition (typical for '79)

🔧 Transmission

Standard

Transmission Type Standard:

Warner T-150 3-speed Manual

Optional

Transmission Type Optional:

Borg-Warner SR4 4-speed Manual (introduced later in production, but '79 may have it)

Transmission Type Optional Auto:

Turbo-Hydramatic TH400 3-speed Automatic

Features

Transfer Case:

Dana 20 2-speed (4x4)

Transfer Case Gear Ratios:

2.00:1 (low range)

📐 Dimensions

Exterior

Wheelbase:

103.5 inches (2629 mm)

Length:

157.3 inches (4000 mm)

Width:

69.4 inches (1763 mm)

Height:

64.4 inches (1636 mm) (approx., depending on top)

Weights

Curb Weight:

3,400 - 3,600 lbs (1542 - 1633 kg) (approx.)

Gross Vehicle Weight Rating Gvwr:

4,700 lbs (2132 kg) (approx.)

Dimensions Other

Ground Clearance:

8.0 - 9.0 inches (203 - 229 mm) (approx.)

🛡️ Safety Features

Ratings

NHTSA Ratings:

Not typically rated by NHTSA in the modern sense for this era, focus on inherent robustness.

Active Features

Brakes Type:

Front Disc / Rear Drum

Parking Brake System:

Mechanical, driveshaft mounted caliper or drum type.

Passive Features

Seat Belts:

Front lap and shoulder belts, rear lap belts (standard).

Rollover Protection:

Roll bar integrated into the windshield frame and seat frame structure, providing basic rollover protection.

Doors:

Removable doors with integrated side impact beams (minimal).

💡 Technology Features

Infotainment

Radio Options:

AM/FM radio (often optional, basic units available).

Speaker Configuration:

Basic single or dual speaker setup.

Driver Assistance

Cruise Control:

Optional on some models, but not common.

🔧 Maintenance

Service Intervals

Oil Change Interval:

Every 3,000 miles (4,800 km) or 3 months, whichever comes first.

Transmission Fluid Change:

Manual: Inspect annually; Automatic: Every 24,000 miles (38,000 km) or 24 months.

Differential Fluid Change:

Every 12,000 miles (19,000 km) or 12 months.

Coolant Flush:

Every 24,000 miles (38,000 km) or 24 months.

Spark Plug Replacement:

Every 12,000 - 24,000 miles (19,000 - 38,000 km) depending on plug type.

Fluid Specifications

Engine Oil Type:

API SF, SAE 10W-30 (or SAE 30 in warmer climates)

Engine Oil Capacity:

5 Quarts (4.7 Liters) with filter change.

Transmission Fluid Manual:

GL-4 SAE 80W-90 Gear Oil

Transmission Fluid Automatic:

Dexron-III (or equivalent) Automatic Transmission Fluid

Power Steering Fluid:

Dexron-II (or equivalent) Automatic Transmission Fluid

Brake Fluid Type:

DOT 3 Hydraulic Brake Fluid

Known Issues

Common Wear Items:

Leaf springs, shock absorbers, U-joints, clutch components, carburetor issues, exhaust manifold cracks (inline-6).

Body Corrosion:

Rust is a common concern, particularly in floor pans, wheel wells, and rocker panels due to age and exposed design.

Electrical Gremlins:

Older wiring harnesses can degrade, leading to intermittent electrical issues.

📚 Vehicle History

Brand Heritage

Jeep Legacy:

Direct descendant of the original Willys MB military Jeep from World War II, renowned for its off-road prowess and go-anywhere capability.

Model Evolution

Cj Series Introduction:

The CJ series (Civilian Jeep) began post-WWII, evolving through various iterations (CJ-2A, CJ-3A, CJ-5, CJ-6, CJ-7, CJ-8).

Cj7 Introduction Year:

The CJ-7 was introduced in 1976 as a successor to the CJ-5, offering a longer wheelbase and improved on-road manners while retaining off-road capability.

Key Cj7 Features Vs Cj5:

Longer wheelbase (103.5" vs 83.5"), wider track, optional automatic transmission, optional power steering, improved interior comfort.

Production

Production Period:

1976 - 1986

Manufacturer:

American Motors Corporation (AMC)

Manufacturing Plant:

Toledo, Ohio, USA

🏆 Awards & Recognition

Recognitions

Off Road Acclaim:

Consistently recognized as one of the most capable off-road vehicles of its era, with a devoted following among off-roaders and collectors.

Cultural Impact:

Became a cultural icon, featured in numerous films and television shows, representing freedom and adventure.