Dodge Ram Gas Owner's Manual page 343

CAUTION!
Towing faster than 30 mph (50 km/h) or for more
than 15 miles (25 km) can cause severe damage to the
transmission.
WHAT TO DO IN EMERGENCIES 343
If the vehicle is to be towed more than 15 miles (25 km)
the vehicle must be towed with the rear wheels raised
and the front wheels on the ground. It may also be towed
on a flatbed or with the front wheels raised and the rear
wheels on a dolly.
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