When You Drive With The Temporary Spare Tire, Do Not: - Ford Ranger Owner's Manual

It is not recommended that the vehicle be operated in the 4WD
modes with a temporary spare. If 4WD operation is necessary,
do not operate at speeds above 10 mph (16 km/h) or for
distances above 50 miles (80 km). Extended operation in 4WD
with a temporary spare may result in damage to powertrain
components.
If you use the temporary spare tire continuously or do
not follow these precautions, the tire could fail, causing
you to lose control of the vehicle, possibly injuring
yourself or others.
To avoid injury, never run the engine with one wheel off
the ground, such as when changing a tire.
Extended use of other than matching size spare tires on a
Traction-Lok axle could result in a permanent reduction in
effectiveness. This loss of effectiveness does not affect normal
driving and should not be noticeable to the driver.

When you drive with the temporary spare tire, DO NOT:

exceed 50 mph (80 km/h) under any circumstances.
load your vehicle so that it is heavier than the maximum
vehicle load rating listed on the tire decal.
tow a trailer.
use tire chains on this tire.
try to repair the temporary spare tire or remove it from its
wheel.
use the wheel for any other type of vehicle.
engage four-wheel drive on dry, hard-surfaced roads.
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