Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1998 Lincoln Navigator 4WDFACTORY OEM SERVICE PROCEDURE
Quick Lookups: Fluids
| FLUID CAPACITIES | |||||||
|---|---|---|---|---|---|---|---|
| Fluid Type | Application | Standard | Metric | Fluid Spec | Note | S/H | |
| Air Cond Compressor Oil | w/Rear A/C | 14.00 OZS. | 0.41 L | PAG 46 | S | ||
| Air Cond Refrigerant | w/Auxiliary Air Cond | 3.85 LBS. | 1.74 KG | R-134a | S | ||
| Air Cond Refrigerant | w/o Auxiliary Air Cond | 2.30 LBS. | 1.04 KG | R-134a | S | ||
| Automatic Transmission Fluid | 15.90 QTS. | 15.04 L | Automatic Transmission Fluid MERCON V | DO NOT mix MERCON and MERCON V. | S | ||
| Automatic Transmission Fluid | 4WD | 16.40 QTS. | 15.52 L | Automatic Transmission Fluid MERCON V | DO NOT mix MERCON and MERCON V. | S | |
| Brake Fluid | N/A | N/A | DOT 3 Brake Fluid | Fill to line on reservoir. | S | ||
| Differential Gear Oil | 3.60 PTS. | 1.7 L | SAE 75W-90 Gear Oil | S | |||
| Differential Gear Oil | Rear | 5.65 PTS. | 2.67 L | SAE 75W-140 Synthetic Rear Axle Gear Oil | Rear axles containing Synthetic Lubricant are lubricated for life. These lubricants only need to be checked or changed if there is a leak, service is needed, or the axle assembly was submerged in water. | S | |
| Engine Coolant | 20.80 QTS. | 19.68 L | 50/50 mixture of FORD Premium Cooling System Fluid and water | S | |||
| Engine Oil | w/Filter | 6.00 QTS. | 5.67 L | SAE 5W-20 Premium Synthetic Blend Motor Oil | Refer to Engine Oil recommended applications for SAE 5W-20 and 5W-30 motor oils TSB No. 02-1-9. | S | |
| Power Steering Fluid | N/A | N/A | Automatic Transmission Fluid MERCON V | Fill to line on reservoir. | S | ||
| Transfer Case Fluid | 2.00 QTS. | 1.89 L | Automatic Transmission Fluid MERCON | Fill to line on reservoir. | S | ||
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
Comes to youSame-day available12-month warranty
Get a Free QuoteNo obligation. See pricing before you book.