Ford 2006 Navigator Owner's Manual page 378

Maintenance and Specifications
Fluid
Front axle Motorcraft SAE
lubricant
Premium Rear
Axle Lubricant
Rear axle Motorcraft SAE
4
lubricant
Synthetic Rear
Axle Lubricant
Windshield
washer fluid
Concentrate
1
Ensure the correct automatic transmission fluid is used. Check the
container to verify the fluid being added is of the correct type. Refer to
your scheduled maintenance information to determine the correct
service interval.
MERCON , MERCON V and MERCON SP are not
interchangeable. DO NOT mix MERCON MERCON V and
MERCON SP. Use of dual usage fluids in an automatic
transmission application requiring MERCON SP may cause
transmission damage. Use of any fluid other than the
recommended fluid may cause transmission damage.
2
Indicates only approximate dry-fill capacity. Some applications may vary
based on cooler size and if equipped with an in-tank cooler. The amount
of transmission fluid and fluid level should be set by the indication on
the dipstick's normal operating range.
3
Add the coolant type originally equipped in your vehicle.
4
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.
5
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.
378
2006 Navigator (nav)
Owners Guide (post-2002-fmt)
USA (fus)
Ford Part Application
Name
4 x 4 vehicles
80W-90
Conventional
75W-140 differential
(9.75 inch axle)
Motorcraft
Premium
Windshield
Washer
Capacity
3.5-3.7 pints
(1.8-2.0L)
4.5 pints (2.13L)
All 4.5 quarts
(4.1L)