FORD 2011 F-550 v.2 - Manual (Page 258)

When backing down a ramp during boat launching or retrieval:
• Do not allow the static water level to rise above the bottom edge of
the rear bumper.
• Do not allow waves to break higher than 6 in (15 cm) above the
bottom edge of the rear bumper.
Exceeding these limits may allow water to enter vehicle components:
• Causing internal damage to the components.
• Affecting driveability, emissions and reliability.
Replace the rear axle lubricant any time the axle has been submerged in
water. Rear axle lubricant quantities are not to be checked or changed
unless a leak is suspected or repair required.
RECREATIONAL TOWING
Follow these guidelines if you have a need for recreational (RV) towing.
An example of recreational towing would be towing your vehicle behind
a motorhome. These guidelines are designed to ensure that your
transmission is not damaged.
Note: Put your climate control system in recirculated air mode to
prevent exhaust fumes from entering the vehicle. Refer to the Climate
Controls chapter for more information.
Drivetrain
configuration
Requirements for neutral towing
4x4 with manual-shift
transfer case Transmission in N (Neutral); transfer case in N
(Neutral); hublocks set to FREE*
4x2 or 4x4 with
electronic-shift
transfer case Do not tow your vehicle with any wheels on
the ground, as vehicle or transmission damage
may occur. It is recommended to tow your
vehicle with all four (4) wheels off the ground
such as when using a car-hauling trailer.
Otherwise, no recreational towing is permitted.
*Always make sure that both hub locks are set to the same position.
In case of a roadside emergency with a disabled vehicle, see Wrecker
towing in the Roadside Emergencies chapter.
Tires, Wheels and Loading
258
2011 F-250/350/450/550 (f23)
Owners Guide, 2nd Printing
USA (fus)