Maintaining your Jeep Grand Cherokee WJ fluid levels is one of the most important maintenance tasks you can perform for your Jeep.
Maintaining your Jeep Grand Cherokee WJ fluid levels is one of the most important maintenance tasks you can perform for your Jeep. This is because the various fluids used in your WJ keep it running at peak performance, and failure to keep up with the fluids can result not only in suboptimum performance, but it can also begin to damage other systems and parts. While you can use your ATF+4 to top off vehicles that use ATF+2 or +3, this does not work in reverse. You should never fill your ATF+4 with anything other than +4. Using the wrong fluids, especially in transmission fluids can result in erratic shifts, wear and failure, sludge buildup, and slippage. Low fluid means that the pump is able to also take in air which causes fluid pressures to drop. Likewise, if the transmission is filled past capacity, the gears will churn the fluids into a foamy mess, which can cause the same reduced performance. Use the following charts to determine which type of fluids you should be using, and at what capacity.
Description | Type | Capacities |
|---|---|---|
| 4.0L Engine Oil | 5W-30 or 10W30 | 6 Quarts / 5.7 Liters |
| 4.7L Engine Oil | 5W-30 or 10W30 | 6 Quarts / 5.7 Liters |
| 4.0L Coolant | 50/50 Mixture 5 Year/100,000 Mile Formula HOAT (Hybrid Organic Additive Technology) or equivalent | 13 Quarts /12.3 Liters |
| 4.7L Coolant | 50/50 Mixture 5 Year/100,000 Mile Formula HOAT (Hybrid Organic Additive Technology) or equivalent | 13 Quarts /12.3 Liters |
| 42RE 4-Speed Automatic | ATF+4 | 4 Quarts / 3.8 Liters (Service Fill) 9.5 Quarts / 8.9 Liters (Overhaul Fill) |
| 45RFE / 545RFE 5-Speed Automatic 2WD | ATF+4 | 5.5 Quarts / 5.2 Liters (Service Fill) 14 Quarts / 13.24 Liters (Overhaul Fill) |
| 45RFE / 545RFE 5-Speed Automatic 4x4 | ATF+4 | 6.6 Quarts / 6.2Liters (Service Fill) 14 Quarts / 13.24 Liters (Overhaul Fill) |
| NV242 Transfer Case | ATF+4 | 1.5 Quarts / 1.4 Liter |
| NV247 Transfer Case | Mopar® Transfer Case Lubricant | 1.25 Quarts / 1.8 Liters |
| Dana 30 - Front Axle | 80W-90 Gear and Axle Lubricant | 2.5 Pints / 1.2 Liters |
| Dana 35 Axle | 80W-90 Gear and Axle Lubricant | 3.5 Pints / 1.7 Liters |
| Dana 44 - Rear Axle | 80W-90 Gear and Axle Lubricant | 4 Pints / 1.89 Liters |
| *Vari-Loc Rear Axles require the addition of 118 ml (4 oz) Limited Slip Additive | ||
| *Limited-Slip (Trac-lok) Rear Axles require the addition of 118 ml (4 oz.) Limited Slip Additive | ||
| *75W140 Gear and Axle Lubricant Recommended For Towing | ||
| Brake Master Cylinder | DOT 3 Brake Fluid | As Required / To Full Mark |
| Clutch Master Cylinder | DOT 3 Brake Fluid | As Required / To Full Mark |
| Power Steering Reservoir | Power Steering Fluid +4 (If unavailable ATF+4 is Acceptable) | As Required / To Full Mark |
