Jeep Wrangler 2020 Owner's Manual page 427

Driving Up Hill
Once you have determined your ability to proceed and have
shifted into the appropriate gear, line your vehicle up for the
straightest possible run. Accelerate with an easy constant
throttle and apply more power as you start up the hill. Do
not race forward into a steep grade; the abrupt change of
grade could cause you to lose control. If the front end begins
to bounce, ease off the throttle slightly to bring all four tires
back on the ground. As you approach the crest of the hill,
ease off the throttle and slowly proceed over the top. If the
wheels start to slip as you approach the crest of a hill, ease off
the accelerator and maintain headway by turning the
steering wheel no more than a 1/4 turn quickly back and
forth. This will provide a fresh "bite" into the surface and will
usually provide enough traction to complete the climb. If
you do not make it to the top, place the vehicle in REVERSE
and back straight down the grade using engine resistance
along with the vehicle brakes.
WARNING!
Never attempt to climb a hill at an angle or turn around
on a steep grade. Driving across an incline increases the
risk of a rollover, which may result in severe injury.
Driving Downhill
Before driving down a steep hill, you need to determine if it
is too steep for a safe descent. What is the surface traction? Is
the grade too steep to maintain a slow, controlled descent?
Are there obstacles? Is it a straight descent? Is there plenty of
distance at the base of the hill to regain control if the vehicle
descends to fast? If you feel confident in your ability to
proceed, then make sure you are in 4L (Low) and proceed
with caution. Allow engine braking to control the descent
and apply your brakes, if necessary, but do not allow the
tires to lock.
WARNING!
Do not descend a steep grade in NEUTRAL. Use vehicle
brakes in conjunction with engine braking. Descending
a grade too fast could cause you to lose control and be
seriously injured or killed.
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