Positioning:
The Jeep Wrangler YJ (1987-1995) represents the second generation of the iconic Jeep Wrangler, marking a significant evolution from the CJ series with a move towards more modern automotive standards while retaining its core off-road capability.
Competitors:
Competed in the compact SUV and off-road vehicle segment against models like the Toyota 4Runner, Nissan Pathfinder, and Ford Bronco II, though the Wrangler maintained a more focused off-road identity.
Defining Features:
Distinctive square headlights (a hallmark of the YJ generation), solid front axle (initially), coil springs replacing leaf springs on the front axle for improved ride comfort, and a focus on ruggedness and off-road prowess.
Value:
This comprehensive workshop manual provides the exact information needed to maintain, diagnose, and repair any aspect of the Jeep Wrangler YJ, empowering owners and mechanics to keep these capable vehicles in optimal condition.
All Models And Trims:
Yes, covers all models and trim levels within the 1987-1995 YJ generation.
Repair Scope:
Complete A-Z repairs, from basic maintenance to complex overhauls.
Estimated Page Count:
Varies by specific manual edition; typically 1000+ pages for complete workshop manuals.
Type:
Complete Workshop Service Repair Manual
Format:
Likely available in Print and/or Digital (PDF) format. Specific product listing should confirm.
Powertrain:
Engine, fuel system, ignition system, exhaust system, cooling system, lubrication system, manual and automatic transmissions, transfer case, axles, drivelines.
Chassis:
Suspension (front and rear leaf springs, shock absorbers, sway bars), steering system (power steering, steering column), braking system (front discs, rear drums/discs depending on model year, parking brake), wheels and tires.
Electrical:
Battery, charging system, starting system, lighting system, instrument panel, ignition, anti-theft systems (if applicable), wiring diagrams, fuses, relays, power windows, power locks, wipers, horn.
Body And Frame:
Body panels, doors, hood, tailgate, bumpers, frame, interior trim, seats, convertible top, hardtop components, glass, mirrors.
Maintenance:
Routine service, oil changes, filter replacements, fluid checks and changes, lubrication, tune-ups, inspections.
Diagnostics And Troubleshooting:
Step-by-step diagnostic procedures for all major systems, including symptom-based troubleshooting guides.
Repair And Overhaul:
Detailed procedures for component removal, disassembly, inspection, repair, assembly, and reinstallation.
Special Tools And Techniques:
Identification and usage instructions for specialized tools required for specific repairs.
Depth:
Comprehensive, covering all aspects of vehicle repair and maintenance, suitable for professional technicians and experienced DIYers.
Specificity:
Highly specific to the Jeep Wrangler YJ models, not generic information.
Digital Format Details:
If PDF: Searchable text, high-resolution images and diagrams, printable pages.
Print Quality Details:
If printed: Clear, legible text and diagrams, durable paper, high-quality binding.
Binding Type Details:
If printed: Likely spiral-bound or perfect-bound for durability and ease of use on a workbench.
Paper Type Details:
If printed: Durable, grease-resistant paper suitable for automotive environments.
Engine 1:
2.5L (150 ci) AMC 150 I4
Engine 1 Power:
Approx. 121-130 hp @ 4000-4500 rpm
Engine 1 Torque:
Approx. 170-181 lb-ft @ 2000-2500 rpm
Engine 2:
4.0L (242 ci) AMC 242 I6 'Power Tech'
Engine 2 Power:
Approx. 177-190 hp @ 4700-4750 rpm
Engine 2 Torque:
Approx. 220-235 lb-ft @ 3000-3250 rpm
Fuel Delivery:
Electronic Fuel Injection (EFI)
Fuel Type:
Unleaded Gasoline (87 Octane recommended)
Ignition Type:
Distributorless Ignition System (DIS) on later 4.0L models; distributor-based on earlier models and 2.5L.
4 0L Engine Code:
AMC 242
2 5L Engine Code:
AMC 150
Manual Transmission:
Aisin-Warner AX-5 (5-speed manual, typically with 2.5L and early 4.0L)
Automatic Transmission:
Chrysler 30-42LE (4-speed automatic, later introduced with 4.0L)
Transfer Case Type:
New Process NP231 Command-Trac (2WD/4WD Part-Time)
Gear Ratios Ax5:
Example: 3.95:1 (1st), 2.10:1 (2nd), 1.41:1 (3rd), 1.00:1 (4th), 0.75:1 (5th), 2.72:1 (Reverse) - Varies by specific model year.
Fluid Type Manual:
Manual Transmission Fluid (MTF), typically GL-3 or GL-4 rated, e.g., Mopar Manual Transmission Lubricant.
Fluid Type Automatic:
ATF+3 (or equivalent specification for the 30-42LE transmission).
Wheelbase:
93.4 inches (2372 mm)
Length:
Approx. 151.5 inches (3848 mm)
Width:
Approx. 66.7 inches (1694 mm)
Height:
Approx. 65.7 inches (1669 mm)
Curb Weight:
Approx. 3,000-3,300 lbs (1360-1497 kg), depending on configuration.
Gross Vehicle Weight Rating:
Approx. 4,500 lbs (2041 kg)
NHTSA Front Crash Test Driver:
Not rated for side impact or rollover protection under modern NHTSA standards for this era. Frontal impact ratings were generally less comprehensive than today.
IIHS Ratings:
Similar limitations as NHTSA; focus was on basic structural integrity and occupant protection for the period.
ABS:
Available on rear wheels from approx. 1993 onwards, optional on all wheels for later models.
Airbags:
Driver-side airbag became standard in 1994, passenger airbag optional on some later models.
Seat Belts:
Three-point seat belts with shoulder belts standard in front; lap belts in rear for early models, three-point belts later.
Roll Cage:
Integral sport bar and roll cage structure for occupant protection, especially in open-top configuration.
Audio System:
Basic AM/FM radio with cassette player was standard. Optional CD player and uprated speaker systems were available.
Instrument Cluster:
Analog gauges for speedometer, tachometer (on some models), fuel, oil pressure, coolant temperature, and voltage. Warning lights for various systems.
ABS Availability:
Rear-wheel ABS introduced mid-generation, optional 4-wheel ABS on later models.
Connectivity Features:
Very limited by modern standards. Primarily analog systems with basic electrical components. No integrated Bluetooth or USB ports from the factory.
Oil Change Interval:
Every 3,000 miles (4,800 km) or 3 months, whichever comes first.
Engine Oil Filter Interval:
Replace with every oil change.
Air Filter Interval:
Every 15,000 miles (24,000 km) or annually.
Transmission Fluid Change Manual:
Every 30,000-60,000 miles (48,000-96,000 km), refer to manual for exact interval based on driving conditions.
Transmission Fluid Change Automatic:
Every 30,000-60,000 miles (48,000-96,000 km), refer to manual for exact interval based on driving conditions.
Engine Oil Spec:
API SG or higher. SAE 10W-30 recommended for most conditions (check manual for ambient temperature variations).
Coolant Spec:
Ethylene Glycol based antifreeze, typically a 50/50 mix with distilled water. Mopar Antifreeze/Coolant (MS-7170 or equivalent).
Brake Fluid Spec:
DOT 3 or DOT 4 Hydraulic Brake Fluid.
Power Steering Fluid Spec:
Power Steering Fluid, e.g., Mopar Power Steering Fluid or DEXRON-II (check manual for exact specification).
Common Yj Issues:
Common issues include rust (body tub, frame, fenders, rocker panels), cracked exhaust manifolds (especially on the 4.0L), worn leaf spring bushings, aging rubber seals and hoses, potential for front axle universal joint failure, and electrical gremlins due to age. The square headlights are also a divisive design element among enthusiasts.
Transfer Case Maintenance:
Regularly check and change NP231 transfer case fluid (typically SAE 75W-90 GL-5 gear oil or Mopar NP231 transfer case lubricant) to prevent wear.
Jeep Legacy:
Jeep has a storied history dating back to World War II with its legendary off-road vehicles. The Wrangler YJ continued this lineage, evolving from the utilitarian CJ series.
Yj Development:
Introduced as the replacement for the CJ-7, the YJ aimed to modernize the Wrangler for broader appeal, particularly by addressing on-road comfort and safety concerns, and was the first Wrangler generation to feature coil springs on the front (from 1987-1991, and later on some 1992+ models, though solid front axle was phased out with rack and pinion steering). Note: Early YJs (1987-1991) retained leaf springs front and rear, while later YJs (1992 onwards) moved to coil springs on all four corners for improved ride and handling. *Correction: YJ models generally featured leaf springs front and rear. The coil spring suspension debuted with the TJ generation in 1997.*
Yj Key Changes:
Major changes include the adoption of square headlights (a significant aesthetic departure), a wider track, and updated interior features. The 4.0L inline-six engine became a highly sought-after option.
Production Period:
1987-1995
Manufacturing Location:
Brampton, Ontario, Canada; Toledo, Ohio, USA.
Off Road Acclaim:
The Wrangler YJ, like its predecessors and successors, is widely recognized for its exceptional off-road capability and ruggedness, making it a popular choice for off-road enthusiasts and rock crawlers.
Consumer Satisfaction:
Consumer satisfaction varies, often tied to expectations of a utilitarian, off-road focused vehicle. Early models are valued for simplicity, later models for the improved 4.0L engine and available ABS.
