Jeep 2007 Grand Cherokee Series Owner's Manual page 331

Towing Tips — Automatic Transmission
The "D" range can be selected when towing. However, if
frequent shifting occurs while in this range, the "Tow/
Haul" mode (if equipped) or a lower gear range should
be selected.
NOTE: Using the "Tow/Haul" mode (if equipped) or a
lower gear range while operating the vehicle under
heavy operating conditions will improve performance
and extend transmission life by reducing excessive shift-
ing and heat build up. This action will also provide better
engine braking.
The automatic transmission fluid and filter should be
changed if you REGULARLY tow a trailer for more than
45 minutes of continuous operation. Refer to "Mainte-
nance Schedule B" in Section 8 of this manual for
transmission fluid change intervals.
NOTE: Check the automatic transmission fluid level
before towing.
STARTING AND OPERATING 331
Towing Tips — Electronic Speed Control (If
Equipped)
− Don't use in hilly terrain or with heavy loads.
− When using the speed control, if you experience speed
drops greater than 10 mph (16 km/h), disengage until
you can get back to cruising speed.
− Use speed control in flat terrain and with light loads to
maximize fuel efficiency.
Towing Tips — Cooling System
To reduce potential for engine and transmission over-
heating, take the following actions:
− City Driving
When stopped for short periods of time, put transmission
in neutral and increase engine idle speed.
− Highway Driving
Reduce speed.
5