1999 FORD F SERIES MOTORHOME AND COMMERCIAL CHASSIS transmission

VEHICLE LOADING
Your vehicle’s load capacity is designed by weight, not volume, so you
cannot necessarily use all available space with large or heavy loads.
Maximum safe vehicle weights as well as tire, rim sizes and inflation
pressures are specified for your vehicle on the Safety Compliance
Certification Label. A Safety Compliance Certification Label was supplied
by Ford Motor Company to the Motorhome Manufacturer. The
manufacturer uses this information and supplies a Compliance
Certification Label which is located inside the vehicle to the left of the
driver.
Before loading a vehicle, familiarize yourself with the following terms:
•Base Curb Weight: Weight of the vehicle including any standard
equipment, fluids, lubricants, etc. It does not include passengers or
aftermarket equipment.
•Payload: Combined maximum allowable weight of cargo, passengers
and optional equipment. The payload equals the gross vehicle weight
rating minus base curb weight.
•GVW (Gross Vehicle Weight): Base curb weight plus payload
weight. The GVW is not a limit or a specification.
•GVWR (Gross Vehicle Weight Rating): Maximum total weight of
the base vehicle, passengers, optional equipment and cargo. The
GVWR is specific to each vehicle and is listed on the Safety
Compliance Label on the driver’s door pillar.
•GAWR (Gross Axle Weight Rating): Carrying capacity for each axle
system. The GAWR is specific to each vehicle and is listed on the
Safety Compliance Label on the driver’s door pillar.
•GCWR (Gross Combined Weight Rating): Maximum combined
weight of towing vehicle (including passengers and cargo) and the
trailer. The GCWR indicates the maximum loaded weight that the
vehicle is allowed to tow.
•Maximum Trailer Weight Rating: Maximum weight of a trailer the
vehicle is permitted to tow. The maximum trailer weight rating is
determined by subtracting the vehicle curb weight for each
engine/transmission combination, any required option weight for trailer
towing and the weight of the driver from the GCWR for the towing
vehicle.
Driving
32

Once through the water, always try the brakes. Wet brakes do not stop
the vehicle as effectively as dry brakes. Drying can be improved by
moving your vehicle slowly while applying light pressure on the brake
pedal.
Driving through deep water where the transmission is submerged
may allow water into the transmission and cause internal
transmission damage.
TRAILER TOWING
Your vehicle may tow a class I, II or III trailer provided the maximum
trailer weight is less than or equal to the maximum trailer weight listed
for your engine and rear axle ratio on the following chart:
Trailer Towing Table
GCWR (Gross Combined Weight Rating)/Trailer Weights
EngineRear axle
ratioMaximum
GCWR-kg
(lbs.)Trailer weight
range-kg (lbs.)
(0-Maximum)Maximum
Frontal Area of
Trailer-m
2(ft2)
6.8L 5.3811 794
(26 000)0-4 763
(0-10 300)5.6 (60)
For high altitude operation reduce GCW by 2% per 300 meters
(1 000 ft) elevation. To determine the maximum trailer weight
designed for your particular vehicle as equipped, follow the section
Calculating the load your vehicle can carry/towearlier in this
chapter.
Preparing to tow
Use the proper equipment for towing a trailer, and make sure it is
properly attached to your vehicle. See your dealer or a reliable trailer
dealer if you require assistance.
Hitches
You must distribute the load in your trailer so that 10 – 15% of the total
weight of the trailer is on the tongue.
Driving
34

Separate functioning brake systems are required for safe control of
towed vehicles and trailers weighing more than 680 kg (1 500 lbs) when
loaded.
Trailer lamps
Trailer lamps are required on most towed vehicles. Make sure your
trailer lamps conform to local and Federal regulations. See your dealer or
trailer rental agency for proper instructions and equipment for hooking
up trailer lamps.
Driving while you tow
Do not drive faster than 88 km/h (55 mph) when towing a trailer.
Speed control may shut off if you are towing on long, steep grades.
When towing a trailer:
•Use a lower gear when towing up or down steep hills. This will
eliminate excessive downshifting and upshifting for optimum fuel
economy and transmission cooling.
•Anticipate stops and brake gradually.
Servicing after towing
If you tow a trailer for long distances, your vehicle will require more
frequent service intervals. Refer to your maintenance guide and or
service guide for more information.
Trailer towing tips
•Practice turning, stopping and backing up in an area before starting on
a trip to get the feel of the vehicle trailer combination. When turning,
make wider turns so the trailer wheels will clear curbs and other
obstacles.
•Allow more distance for stopping with a trailer attached.
•The trailer tongue weight should be 10% of the loaded trailer weight.
•After you have traveled 80 km (50 miles), thoroughly check your
hitch, electrical connections and trailer wheel lug nuts.
•When stopped in traffic for long periods of time in hot weather, place
the gearshift in P (Park) and increase idle speed. This aids engine
cooling and air conditioner efficiency.
•Vehicles with trailers should not be parked on a grade. If you must
park on a grade, place wheel chocks under the trailer’s wheels.
Driving
36

Fuse/Relay
LocationFuse Amp
RatingDescription
9 20A Trailer tow Electric Brake controller feed,
Body builder right rear turn/stop feed, Body
builder left rear turn/stop feed, Body builder
stop lamp feed, Trailer left turn/stop fuse
feed, Trailer right turn/stop fuse feed
10 5A Instrument cluster memory
11 30A Wiper motor/module power feed
12 10A Trailer tow right turn feed
13 10A ABS Module
14 10A Warning chime module, Power brake assist
module*, Instrument cluster power,
Instrument cluster warning lamps,
Transmission control switch
15 15A Left turn signal relay contacts
16 20A Body builder battery (+12V) feed
17 5A Body builder radio feed
18 — Not Used
19 5A Headlamp relay
20 — Not Used
21 15A Right turn signal relay contacts
22 — Not Used
23 — Not Used
24 — Not Used
25 10A Right headlamp
26 10A Speed control module, Brake shift interlock
actuator
27 — Not used
28 — Not used
29 — Not used
30 — Not used
31 10A Left headlamp
32 10A Backup lamp feed
Roadside emergencies
41

The high-current fuses are coded as follows.
Fuse/Relay
LocationFuse Amp
RatingDescription
1 5A* Power Brake Assist Module***
2 20A* Horn Feed
3 20A* 4R100 Transmission, Vapor Management
Valve Solenoid, Heated Exhaust Gas Oxygen
(HEGO) Sensors, EVR Solenoid
4 5A* Powertrain Control Module Memory
5 15A* Powertrain Control Module Power, Fuel
Pump Relay Coils, Fuel Injectors, IAC
Solenoid, Mass Air Flow Sensor
6 20A* Front Park Lamp Feed, Rear Park Lamp
Feed, Trailer Tow Running Lamp Relay Coil,
I/P Dimmer Module
7 15A* Starter Relay Coil, BB Neutral Sense
19 29
18 28
17 27
16 26
15 25
14 24
13
11 12
910
78
56
34
1223
22
21
20
6
5
4
3
2
1DIODE2
DIODE1
Roadside emergencies
43

4. Apply the parking brake and turn
engine OFF.
5. Block the wheel that is diagonally
opposite the tire you are changing.
The parking brake is on the
transmission. Therefore, the vehicle
will not be prevented from moving
when a rear wheel is lifted, even if
the parking brake is applied. Be
sure to block both directions of the wheel that is diagonally opposite to
the wheel that is being lifted.
If the vehicle slips off the jack, you or someone else could be
seriously injured.
6. Remove the spare tire and jack from the storage location.
7. Loosen the wheel nut by pulling up on the handle of the lug nut
wrench about one-half turn (counterclockwise). Do not remove the
wheel lug nuts until you raise the tire off the ground.
Replacing the tire
To lessen the risk of personal injury, do not put any part of your
body under the vehicle while changing a tire. Do not start the
engine when your vehicle is on the jack. The jack is only meant for
changing the tire.
Roadside emergencies
46

Do not start your engine with the air cleaner removed and do
not remove it while the engine is running.
IDENTIFYING COMPONENTS IN THE ENGINE COMPARTMENT
6.8L V10 ENGINE
1. Engine coolant reservoir
2. Engine oil filler cap
3. Automatic transmission fluid dipstick
4. Engine oil dipstick
5. Air filter assembly
6. Brake fluid reservoir
7. Power steering fluid reservoir
ENGINE OIL
Checking the engine oil
Refer to the Scheduled Maintenance Guide for the appropriate intervals
for checking the engine oil .
1. Make sure the vehicle is on level ground.
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Maintenance and care
55

TRANSMISSION FLUID
Checking automatic transmission fluid
Refer to your Scheduled Maintenance Guide for 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 30 km [20 miles]). 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 30 km (20 miles) 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, wiping it clean with a clean, dry lint free rag.
6. Install the dipstick making sure it is fully seated in the filler 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 10°C (50°F).
Correct fluid level
The transmission fluid should be checked at normal operating
temperature 66°C-77°C (150°F-170°F) on a level surface. The normal
operating temperature can be reached after approximately 30 km
(20 miles) of driving.
Maintenance and care
65