Market Position:
The 1994 Jeep Grand Cherokee ZJ represented a significant step forward for Jeep, transitioning from a compact SUV to a more refined, full-size premium offering. It competed in the burgeoning mid-size luxury SUV market against vehicles like the Ford Explorer, Chevrolet Blazer, and Toyota 4Runner.
Competitive Analysis:
The ZJ's unibody construction offered a more car-like ride than its predecessor (XJ), while retaining Jeep's renowned off-road capabilities. The availability of V8 engines and upscale interior features positioned it as a more luxurious and powerful alternative to many competitors.
Key Features:
Unibody construction for improved ride comfort, available V8 engines, robust 4x4 systems (Selec-Trac, Command-Trac, Quadra-Trac), spacious interior, and a more premium feature set compared to previous Jeep models.
Systems:
Introduction, Lubrication & Maintenance, Front Suspension and Axle, Rear Suspension and Axles, Brakes, Clutch, Cooling System, Electrical, Engines, Exhaust System and Intake Manifold, Frame and Bumpers, Fuel System, Propeller Shafts, Steering, Transmission and Transfer Case, Wheels and Tires, Body Components, Heating and Air Conditioning, Emission Control Systems, Index.
Procedures:
Step-by-step repair instructions, diagnostic procedures, maintenance schedules, troubleshooting guides, component removal and installation.
Depth:
Suitable for DIYers and experienced mechanics; covers all areas of repair with detailed instructions and diagrams.
Engine 1:
4.0L (242 cu in) Inline-6 OHV 'Power-Tech'
Displacement Hp Torque 1:
Approx. 180-190 hp, 220-230 lb-ft torque (exact figures vary slightly by year and calibration).
Displacement Hp Torque 2:
5.2L (318 cu in) V8 OHV 'Magnum'
Performance V8:
Approx. 220-230 hp, 290-300 lb-ft torque.
Fuel System:
Multi-port Electronic Fuel Injection (MPI).
Engine Management:
Engine Control Module (ECM) controlling ignition timing, fuel delivery, and emissions.
Transmission Standard:
4-speed automatic (42RE for 4.0L, 44RE for 5.2L V8).
Transmission Optional:
5-speed manual (NV3500) was available on some early ZJ models, but less common for 1994.
Transfer Case Options:
Selec-Trac (full-time 4WD), Command-Trac (part-time 4WD), and Quadra-Trac (full-time 4WD with viscous coupling).
Transmission Fluid:
ATF+4 (or equivalent specification for the era, check manual for exact spec).
Length:
Approximately 177.7 inches.
Width:
Approximately 70.5 inches.
Height:
Approximately 64.5 inches.
Wheelbase:
Approximately 101.4 inches.
Ground Clearance:
Varies with suspension, typically around 8 inches.
Curb Weight:
Approx. 3900 - 4300 lbs depending on engine and options.
Active Safety:
Four-wheel Anti-lock Braking System (ABS).
Passive Safety:
Front airbags, three-point seat belts with pretensioners, reinforced safety cage construction.
NHTSA Rating:
Specific NHTSA ratings for 1994 are not readily available, but the ZJ was designed to meet evolving safety standards of the era.
Infotainment System:
Base models typically featured an AM/FM radio with cassette player. Higher trims offered optional CD players and premium sound systems.
Driver Assistance Features:
ABS was the primary driver assistance feature. No electronic stability control or advanced driver aids were available in 1994.
Connectivity Features:
Limited to aftermarket radio installations. No factory integrated Bluetooth or smartphone connectivity.
Climate Control:
Manual or optional automatic climate control systems were available, including air conditioning and heating.
Oil Change Interval:
Typically every 3,000-5,000 miles or 3-6 months, depending on driving conditions. Consult the manual for specific recommendations.
Engine Oil Spec:
API Certified SAE 10W-30 (or 5W-30 for colder climates). Verify with the manual for precise specification.
Engine Oil Capacity:
4.0L I6: Approx. 5 quarts (4.7L); 5.2L V8: Approx. 5 quarts (4.7L). Always check dipstick.
Fluid Specifications Coolant
Coolant Spec:
Ethylene Glycol based antifreeze (green) meeting Chrysler MS-9769 specification or equivalent. A 50/50 mixture with distilled water is typical.
Common Issues:
Common issues can include rear main seal leaks, head gasket failures (especially on early 4.0L models), cracked exhaust manifolds, interior electrical gremlins (window motors, power locks), and potential transfer case chain stretch. Regular maintenance is key to mitigating these.
Oil Filter Part Number:
Commonly Fram PH8A or equivalent (e.g., Wix 51515, Purolator L30001). Verify with specific vehicle VIN.
Service Intervals Transmission
Transmission Fluid Change:
Typically every 30,000-60,000 miles, or as per severe service recommendations. Check manual.
Service Intervals Transfer Case
Transfer Case Fluid Change:
Every 30,000-60,000 miles. Consult manual for specific fluid type (e.g., ATF+4 or NP-242 specific fluid).
Service Intervals Differentials
Differential Fluid Change:
Every 30,000-60,000 miles. Front and rear differentials may require different specifications (e.g., 80W-90 GL-5).
Brand Heritage:
Jeep has a long-standing heritage of producing capable off-road vehicles, dating back to World War II. The Grand Cherokee was introduced in 1993 as a more sophisticated and comfortable offering while still embodying the Jeep spirit.
Model Evolution:
The ZJ generation (1993-1998) marked a significant departure from the XJ Cherokee with its larger size, unibody construction, and luxury appointments. It paved the way for subsequent Grand Cherokee generations.
Production Location:
Detroit, Michigan, USA.
