Grand Cherokee ZJ Service Information

Grand Cherokee ZJ Fluid Capacities and Specifications

Proper maintenance of your Grand Cherokee ZJ involves keeping track of fluid capacities and specifications. Below is a comprehensive guide to help you keep everything in check.

Engine Oil

• 5.9L Engine: 6 Quarts / 5.7 Liters of 5W-30 or 10W-30
• 5.2L Engine: 4 Quarts / 3.8 Liters of 5W-30 or 10W-30
• 4.0L Engine: 5 Quarts / 4.7 Liters of 5W-30 or 10W-30

Coolant (50/50 Mixture 3 Year Formula IAT)

• 5.9L & 5.2L Engines: 14.9 Quarts / 14.1 Liters
• 4.0L Engine: 12 Quarts / 11.4 Liters

Automatic Transmission Fluid

• AW4 4-Speed: 3.5 Quarts Service Fill / 8.2 Quarts Overhaul
• 42RE & 44RE 4-Speed: 3.5 Quarts Service Fill / 10 Quarts Overhaul
• 46RH & 46RE 4-Speed: 3 Quarts Service Fill / 11 Quarts Overhaul

Manual & Transfer Cases

• AX-15 Manual: 3.27 Quarts of 75W-90 API Grade GL-5
• NP231, NV242, NV249 Transfer Cases: 1.1 to 1.5 Quarts of ATF+4

Axle Fluid

• Dana 30 - Front Axle: 1.3 Quarts of 80W-90
• Dana 35 & 44 - Rear Axle: 1.8 to 2 Quarts of 80W-90
• Note: Trac-lok Axles require an additional 4 oz. of Limited Slip Additive

Miscellaneous Fluids

• Brake Master Cylinder & Clutch Master Cylinder: DOT 3 Brake Fluid (DOT 4 acceptable)
• Power Steering Reservoir: Power Steering Fluid +4; ATF+4 if unavailable

A/C System

• All Engines: 1.75 Pounds / 0.79 Kilograms of R-134a

Fuel Specifications

• All Engines: 23 Gallons of 87 Octane or Higher, Unleaded

Spark Plug Specifications

• 5.9L & 5.2L Engines: NGK® or Champion® Copper Spark Plug, 0.040 in / 1.00 mm
• 4.0L Engine: NGK® or Champion® Copper Spark Plug, 0.35 in / 0.89 mm

Additional Notes:

• Antifreeze: Complete cooling system flush is necessary when switching antifreeze types.
• Transmission Fluid: ATF+4 supersedes all prior formulas.
• Ethanol: Never use ethanol-based fuels like E-85 or E-90; up to 10% ethanol content is acceptable.
• Brake Fluid: DOT 4 can be used if DOT 3 is unavailable; however, it has a shorter service life.

By following these specifications, you can ensure your Grand Cherokee ZJ operates efficiently and continues to perform well under all conditions.