Page 285 of 312

Fluid Ford Part
Name Application Capacity
Automatic
transmission
fluid 3
Motorcraft
MERCON SP
AT F TorqShift
(5–speed) 17.5 quarts
(16.6L) 5
(includes
remote filter
element change)
Windshield
washer fluid Motorcraft
Premium
Windshield
Washer
Concentrate All 4.25 quarts
(4.0L)1
Add 8 oz. (236 ml) of Additive Friction Modifier XL-3 or equivalent
meeting Ford Specification EST-M2C118–A for complete refill of limited
slip axles. Ford design rear axles contain a synthetic lubricant that does
not require changing unless the axle has been submerged in water. Dana
rear axles also contain a synthetic lubricant but do require a change.
Refer to your Scheduled Maintenance Guide for change intervals on
Dana rear axles. 2
Add the coolant type originally equipped in your vehicle. 3
Ensure the correct automatic transmission fluid is used. Transmission
fluid requirements are indicated on the end of the dipstick. Check the
container to verify the fluid being added is of the correct type. Refer to
your Scheduled Maintenance Guide 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 a transmission fluid other than the
recommended fluid may cause transmission damage. 4
Service refill capacity is determined by filling the transmission to the
bottom of the filler hole with the vehicle on a level surface. The 6–speed
manual transmission is equipped with an in-tank cooler. Verify the fluid
level after operating vehicle to assure correct fluid level. 5
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.
2005 F250/350/450/550 (f23)
Owners Guide (post-2002-fmt)
USA_English (fus) Maintenance and Specifications
285
Page 288 of 312

Item Ford part
name or
equivalent Ford part
number Ford
specification
Power steering
fluid and
transfer case
fluid (if
equipped) Motorcraft
MERCON AT F XT-2-QDX MERCON
Manual
transmission
(6-speed) Motorcraft
MERCON AT F 2
XT-2-QDX MERCON
Automatic
transmission
TorqShift
(5–speed) Motorcraft
MERCON SP
AT F 2
XT-6–QSP MERCON SP
Windshield
washer fluid Motorcraft
Premium
Windshield
Washer
Concentrate ZC-32–A WSB-M8B16–A21
Add 8 oz.(236 ml) of Additive Friction Modifier XL-3 or equivalent
meeting Ford specification EST-M2C118-A for complete refill of limited
slip axles. Ford design rear axles contain a synthetic lubricant that does
not require changing unless the axle has been submerged in water. Dana
rear axles also contain a synthetic lubricant but do require a change.
Refer to your Scheduled Maintenance Guide for change intervals on
Dana rear axles. 2
Ensure the correct automatic transmission fluid is used. Transmission
fluid requirements are indicated on the end of the dipstick. Check the
container to verify the fluid being added is of the correct type. Refer to
your Scheduled Maintenance Guide 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 a transmission fluid other than the
recommended fluid may cause transmission damage.
2005 F250/350/450/550 (f23)
Owners Guide (post-2002-fmt)
USA_English (fus)Maintenance and Specifications
288
Page 307 of 312

treadwear ........................131, 155
Towing .......................................167
Trailer Brake
Controller-Integrated ..............171
trailer towing ..........................167
wrecker ....................................229
Traction-lok rear axle ...............186
Trailer Brake
Controller-Integrated ................171
Transfer case
fluid checking .........................279
Transmission
automatic operation .........55, 187
brake-shift interlock (BSI) ....187
fluid, checking and adding
(automatic) .............................275
fluid, checking and adding
(manual) .................................278
fluid, refill capacities ..............283
lubricant specifications ..286, 289
manual operation ....................191
Turn signal ..................................44 V
Vehicle dimensions ...................289
Vehicle Identification Number
(VIN) ..........................................296
Vehicle loading ..........................160
Ventilating your vehicle ...........183
W
Warning lights (see Lights) .......12
Washer fluid ..............................251
Water, Driving through .............209
Windows
power .........................................57
Windshield washer fluid and
wipers ..........................................54
checking and adding fluid .....251
replacing wiper blades .............54
Wrecker towing .........................229
2005 F250/350/450/550 (f23)
Owners Guide (post-2002-fmt)
USA_English (fus) Index
307