Ford Low Cab Forward (Ford year). Manual — part 37

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.

4. Latch the gearshift lever in P (Park) and leave the engine running.

5. Remove the dipstick, and wipe it clean with a clean, dry lint free rag.

6. Install the dipstick making sure it is fully seated in the tube.

7. Remove the dipstick and inspect the fluid level. The fluid should be in
the designated area for normal operating temperature or ambient
temperature.

Low fluid level

Do not drive the vehicle if the fluid
level is at the bottom of the dipstick
and the ambient temperature is
above 50°F (10°C).

Correct fluid level

The transmission fluid should be checked at normal operating
temperature 150°F-170°F (66°C-77°C) on a level surface. The normal
operating temperature can be reached after approximately 20 miles
(30 km) of driving.

You can check the fluid without driving if the ambient temperature is
above 50°F (10°C). However, if fluid is added at this time, an overfill
condition could result when the vehicle reaches normal operating
temperature.

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150

The transmission fluid should be in
this range if at normal operating
temperature (150°F-170°F
[66°C-77°C]).

The transmission fluid should be in
this range if at ambient temperature
(50°F-95°F [10°C-35°C]).

High fluid level

Fluid levels above the safe range
may result in transmission failure.
An overfill condition of transmission
fluid may cause shift and/or
engagement concerns and/or
possible damage.

High fluid levels can be caused by
an overheating condition.

Adjusting automatic transmission fluid levels

Before adding any fluid, make sure the correct type is used. The type of
fluid used is indicated on a tag located on the transmission fill tube and
also in the Lubricant specifications section in this chapter.

Use of a non-approved automatic transmission fluid may cause
internal transmission component damage.

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151

If necessary, add fluid in

1

⁄

2

pint

(250 ml) increments through the
filler tube until the level is correct.

If an overfill occurs, excess fluid
should be removed by a qualified
technician.

An overfill condition of
transmission fluid may cause
shift and/or engagement
concerns and/or possible
damage.

Do not use supplemental transmission fluid additives, treatments or
cleaning agents. The use of these materials may affect transmission
operation and result in damage to internal transmission components.

Maintenance and Specifications

152

AIR FILTER REPLACEMENT

The air filter should be replaced any
time the air filter restriction gauge
reads 25 inches (635 mm) or as
indicated by the maintenance
intervals in the scheduled
maintenance information.

1. Remove the cover by releasing
the clamp and turning the cover
counterclockwise and pulling it off.

2. Remove the dirty filter and
discard it.

3. Clean any accumulation of dirt
from the housing using a damp rag.
Do not use compressed air to
clean the housing.

4. Inspect the housing for damage
or distortion which would allow
unfiltered air to enter the engine.

5. Install the new filter. Install the cover onto the housing, then turn it
clockwise and close the clamp.

After replacing the filter, reset the gauge by pressing the reset button on
top of the gauge.

Air filter restriction gauge

This gauge, located on top of the air
filter housing, measures the vacuum
inside the air cleaner. The more the
air cleaner is restricted (dirty,
clogged), the higher the vacuum
reading.

Maintenance and Specifications

153