Page 305 of 336

1. Clean the reservoir cap before
removal to prevent dirt and water
from entering the reservoir.
2. Remove cap and rubber
diaphragm from reservoir.
3. Add fluid until the level reaches
the step in the reservoir.
4. Reinstall rubber diaphragm and
cap onto reservoir.
TRANSMISSION FLUID
Checking automatic transmission fluid (if equipped)
Refer to yourscheduled maintenance informationfor scheduled
intervals for fluid checks and changes. Your transmission does not
consume fluid. However, the fluid level should be checked if the
transmission is not working properly, i.e., if the transmission slips or
shifts slowly or if you notice some sign of fluid leakage.
Automatic transmission fluid expands when warmed. To obtain an
accurate fluid check, drive the vehicle until it is at normal operating
temperature (approximately 20 miles [30 km]). If your vehicle has been
operated for an extended period at high speeds, in city traffic during hot
weather or pulling a trailer, the vehicle should be turned off for about
30 minutes to allow fluid to cool before checking.
1. Drive the vehicle 20 miles (30 km) or until it reaches normal operating
temperature.
2. Park the vehicle on a level surface and engage the parking brake.
3. With the parking brake engaged and your foot on the brake pedal,
start the engine and move the gearshift lever through all of the gear
ranges. Allow sufficient time for each gear to engage.
2006 F-150(f12)
Owners Guide (post-2002-fmt)
USA(fus)
Maintenance and Specifications
305
Page 316 of 336

5Your vehicle’s rear axle is filled with a synthetic rear axle lubricant and
is considered lubricated for life. These lubricants do not need to be
checked or changed unless a leak is suspected, service is required or the
axle assembly has been submerged in water. The axle lubricant should
be changed any time the rear axle has been submerged in water.
6Service refill capacity is determined by filling the axle to 1/4-9/16 inch
(6-14 mm) below the bottom of the filler hole with the vehicle on a level
surface.
Add 4 oz. (118 ml) of Additive Friction Modifier XL–3 or equivalent
meeting Ford specification EST-M2C118–A, for complete fill of 8.8 inch
and 9.75 inch Traction-Lok axles.
7Service refill capacity is determined by filling the axle to the bottom of
the filler hole with the vehicle on a level surface.
For 10.25 inch Traction-Lok axles, use 6.5 pints (3.1L) of Motorcraft SAE
75W-140 Synthetic Rear Axle Lubricant and 8 oz. (236 ml) of Additive
Friction Modifier XL–3 or equivalent meeting Ford Specification
EST-M2C118-A.
8Use 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.
LUBRICANT SPECIFICATIONS
ItemFord part
name or
equivalentFord part
numberFord
specification
Front axle
(4X4)Motorcraft SAE
80W-90
Premium Rear
Axle LubricantXY-80W-90-QL WSP-M2C197–A
Rear axleMotorcraft SAE
75W-140 High
Performance
Rear Axle
Lubricant
(synthetic)
1
XY-75W140–QL WSL-M2C192–A
2006 F-150(f12)
Owners Guide (post-2002-fmt)
USA(fus)
Maintenance and Specifications
316
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Inspection/maintenance
(I/M) testing ..............................302
Instrument panel
cleaning ...................................268
cluster ........................................12
lighting up panel and
interior .......................................55
J
Jack ............................................244
positioning ...............................244
storage .....................................244
Jump-starting your vehicle ......251
K
Keyless entry system ...............106
autolock ...................................104
programming entry code .......107
Keys ...........................................109
positions of the ignition .........201
L
Lamps
autolamp system .......................53
bulb replacement
specifications chart ..................59
daytime running light ...............54
fog lamps ...................................55
headlamps .................................53
headlamps, flash to pass ..........54
instrument panel, dimming .....55
interior lamps .....................57–58
replacing bulbs ...................60, 63
Lane change indicator
(see Turn signal) ........................57
Lights, warning and indicator ....12
anti-lock brakes (ABS) ..........206
Load limits .................................180Loading instructions .................187
Locks
autolock ...................................104
childproof ..................................97
Lubricant specifications ...316, 319
Lug nuts ....................................250
Lumbar support, seats .............113
M
Manual transmission .................215
reverse .....................................217
Message center ...........................84
english/metric button ...............89
system check button ................88
warning messages .....................90
Mirrors ...................................65, 72
automatic dimming
rearview mirror .........................71
fold away ...................................72
heated ........................................73
programmable memory ....99, 115
side view mirrors (power) .......72
signal .........................................73
Moon roof ....................................77
Motorcraft parts ........272, 292, 312
O
Octane rating ............................296
Oil (see Engine oil) ..................280
P
Parking brake ............................206
Parts (see Motorcraft parts) ....312
Passenger Occupant
Classification Sensor .................118
2006 F-150(f12)
Owners Guide (post-2002-fmt)
USA(fus)
Index
332