Volvo S90 Operation Manual page 69

1998 Volvo S90
Special Tips - automatic transmission
For driving down steep hills and when driving
for prolonged periods at low speeds, position L
should be selected. Avoid, however, repeated
changes since this can cause overheating of the
transmission oil. For driving on long continuous
uphill gradients, select position 3.
Do not hold the car stationary on an incline by
using the accelerator pedal. Instead, apply the
hand brake (parking brake). This prevents the
transmission oil from becoming overheated.
When towing a trailer, select shift position 3.
The (E)conomy mode should be selected when
the cruise control is engaged.
Never select P or R while the car is in motion.
When initially selecting positions D, 3, L or R,
your right foot should press firmly on the brake
pedal to ensure that the car is standing still with
the engine idling.
The gear selector should not be downshifted to
L at speeds above 75 mph (125 km/h). Always
observe posted speed limits.
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Cooling system
The risk for overheating is greatest, especially in
hot weather, when:
towing a trailer up steep inclines for prolonged
periods at wide open throttle and low engine rpm.
stopping the engine suddenly after high speed
driving (so-called "after-boiling" can occur).
To avoid overheating, the following rules should
be followed:
Reduce speed and downshift when towing a
trailer up long, steep inclines. The risk of
overheating can be reduced by switching off the
air conditioning system for a short time.
Do not let the engine idle unnecessarily for
prolonged periods.
Do not mount auxiliary lamps in front of the
grill.
When the risk of overheating is imminent, or in
the event of overheating, (the temperature gauge
goes repeatedly into, or stays continually in, the
red section) the following precautions should be
taken:
Switch off the air conditioning system.
Pull off the road, away from traffic, stop the car
and put the gear lever into neutral. Do not stop the
engine!
Switch the heater to full (maximum) position.
Increase the engine speed to approx. 2000 rpm
(twice idling speed) until the temperature begins
to drop.
See "Coolant" to check and top-up the coolant
level if necessary.
WARNING! Do not remove coolant expansion
tank cap. The coolant will be extremely hot.
Points to remember
pg. 61