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Item Capacity Ford part name
Ford part number /
Ford specification
Rear axle
fluid–Conventional
differential
(9.75 inch axle)
4.5 pints (2.1L)
Motorcraft SAE 75W-140
Synthetic Rear Axle
Lube
5
XY-75W140-QL /
WSL-M2C192-A
Transfer case fluid
(4X4)
1.6-1.8 quarts
(1.5-1.7L)
Motorcraft Transfer Case
Fluid
XL–12 /
—
Windshield washer fluid 4.5 quarts (4.1L)
Motorcraft Premium
Windshield Washer
Concentrate
ZC-32-A /
WSB-M8B16-A2
Fuel tank (Standard)
28.0 gallons
(106.0L)
——
Fuel tank (Navigator L)
33.5 gallons
(126.8L)
——
1
Add the coolant type originally equipped in your vehicle.
2
Use of synthetic or synthetic blend motor oil is not mandatory. Engine oil need only meet the
requirements of Ford specification WSS-M2C930-A and the API Certification mark.
3
Indicates only approximate dry-fill capacity. Some applications may vary based on cooler size and
if equipped with an in-tank cooler.
4
Automatic transmissions that require MERCON LV should only use MERCON LV fluid. Refer to
scheduled maintenance information to determine the correct service interval. Use of any fluid
other than the recommended fluid may cause transmission damage.
5
Your vehicle’s rear axle is filled with a synthetic rear axle lubricant and is considered lubricated
for life. These lubricants are not to be checked or changed unless a leak is suspected, service is
required or the axle has been submerged in water. The axle lubricant should be changed any time
the axle has been submerged in water.
Maintenance and Specifications
370
2010 Navigator (nav)
Owners Guide (own2002), 1st Printing
USA (fus)