Rear Towing Hookup
- If the vehicle is equipped with cab air suspension, and
reverse towing at speeds above 45 mph (70 kph) is necessary, hold
down the cab as follows:
- Drain the air from the cab air springs.
- Loop a 2-inch (5-cm) ratchet-style tension strap (rated 2000 lb [900 kg] minimum work load) over the top of the cab shock and under the frame rail. Tighten the strap for a snug fit. If the cab is equipped with two or more shocks, restrain the aftmost shock on each side of the vehicle.
- Place the front tires straight forward and secure the steering wheel in this position.
- Disconnect the battery ground cables.
- On dual drive axles, using protection to keep the chains from damaging the vehicle frame, chain the forward-rear drive axle to the frame.
- Attach the towing device.
- Lift the vehicle and secure the safety chains. If extra clearance is needed, remove the bumper extension if equipped.
- Connect the clearance lights, taillights, and signal lights. Also connect any special towing lights required by local regulations.
Notice: Using a rear towing hookup on a vehicle equipped with a roof fairing could cause damage to the cab structure.
If reverse towing at speeds above 45 mph (70 kph) is necessary, hold down the cab with tension straps looped over the cab shocks and under the frame rails. Failure to do so could allow the wind load to lift the cab unexpectedly, resulting in damage to the air springs and other components.
Notice: Failure to protect the frame rails from the chains could cause damage, leading to eventual frame failure.
Note: Due to the many variables that exist in towing, positioning the lifting and towing device is the sole responsibility of the towing-vehicle operator.