Ford 1999 Explorer Owner's Manual page 249

Fluid
Rear axle
2,
lubricant
Windshield
washer fluid
1
If your engine coolant is green in color, use Ford Premium Cooling
System Fluid. If your coolant is orange in color, use Ford Extended Life
Engine Coolant. Refer to Adding engine coolant, in the Maintenance
and Care chapter.
2
Fill to 6 mm to 14 mm (1/4 inch to 9/16 inch) below bottom of fill hole.
3
Vehicles equipped with 4.0L OHV V6 and 4.0L SOHC V6 engines may
be equipped with a conventional rear axle. Refer to your Scheduled
Maintenance Guide for axle fluid change intervals.
4
Vehicles equipped with 4.0L OHV V6 and 4.0L SOHC V6 engines and
3.73:1 or 4.10:1 rear axle ratios or with a 5.0L V8 engine require
synthetic rear axle lubricant. Rear axles containing synthetic lubricant
are lubricated for life. These lubricants are not to be checked or changed
unless a leak is suspected or service is required. The axle lubricant
should be changed any time the axle has been submerged in water.
Add 118 ml (4 oz.) of additive friction modifier C8AZ-19B546-A, Ford
specification EST-M2C118–A for complete refill of Traction-Lok axles.
Capacities and specifications
Ford Part
Name
Motorcraft SAE
80W90
Premium Rear
Axle Lubricant
Motorcraft SAE
75W140 High
Performance
Synthetic Rear
Axle Lubricant
Ultra-Clear
Windshield
Washer
Concentrate
Application
Refer to
footnote 3
Refer to
footnote 4
All
Capacity
2.9-3.1L (5.5-5.8
pints)
2.6L (2.7 quarts)
249