1998 Lincoln Navigator Scheduled Maintenance Guide 2nd Printing - Page 5

Normal schedule Items for Emission Control Service are shown in italics. Wheel lug nuts must be retightened to proper torque specifications at 800 km (500 miles) of new vehicle operation. See your dealer for proper torque specifications. Also retighten to proper torque specifications at 800 km (500 miles) after (1) any wheel change or (2) any other time the wheel lug nuts have been replaced. Rear axles containing synthetic lubricant are lubricated for life. These lubricants are not to be checked or changed unless a leak is suspected, service required or the axle assembly has been submerged in water. The axle lubricant should be changed anytime the axle has been submerged in water. Non-synthetic rear axle lubricants should be replaced every 3,000 miles or 3 months, whichever occurs first, during extended trailer tow operation above 21 Celsius (70 degrees Fahrenheit) ambient and wide open throttle for extended periods above 45 mph. The 3,000 mile lube change interval may be waived if the axle was filled with 75W140 synthetic gear lubricant meeting Ford specification WSL-M2C192-A, part number F1TZ-19580-B or equivalent. Add four ounces of additive friction modifier C8AZ-19B546-A (EST-M2C118-A) or equivalent for complete refill of Traction-Lok rear axles. The rear axles lubricant should be changed anytime the axle has been submerged in water. Light duty trucks equipped with Ford design front axles are lubricated for life. These lubricants are not to be checked or changed unless a leak is suspected, service required or the axle assembly has been submerged in water. The axle lubricant should be changed anytime the axle has been submerged in water. Police and Taxi Vehicles: Replace rear axle lubricant every 160,000 km (100,000 miles). Rear axle lubricant change may be waived if the axle was filled with 75W140 synthetic gear lubricant meeting Ford specification WSL-M2C192-A, part number F1TZ-19580-B or equivalent. Add four ounces of additive friction modifier C8AZ-19B546-A (EST-M2C118-A) or equivalent for complete refill of Traction-Lok rear axles. The rear axles lubricant should be changed anytime the axle has been submerged in water. At 96,000 km (60,000 miles) your dealer will replace the PCV valve at no cost except on Canadian and California vehicles. 5