Automatic and Automated Transmissions
PART 7: STARTING & OPERATING THE VEHICLE
• When driving on a surface with good traction, keep the
interaxle differential unlocked. You can drive with the
axle in LOW or HIGH range.
0006
• When you are driving with poor traction, lock the dif-
ferential. When you have the differential locked, drive
with the axle in LOW range only.
• Always UNLOCK the interaxle differential before shift-
ing the axle speed range.
CAUTION: If you shift the axle range with the
interaxle differential in LOCK, you could do
serious damage to your axles. Never shift the
axle range with the differential locked.
• Park the truck with the Range Selector in LOW.
Automatic and Automated Transmissions
An automatic or automated transmission makes shifting
much easier. It remains important to completely under-
stand how to operate the transmission to optimize its ef-
fi
ciency. Please read the manual for your automatic or au-
tomated transmission included with your vehicle.
There is no “park” position. So you will need to apply the
parking brake before leaving the cab.
– 84 –
Y53-6015
R(08/07)
Summary of Contents for Peterbilt 320
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Page 210: ...PART 11 SUBJECT INDEX Windshield Washer Reservoir 29 206 Y53 6015 R 08 07 ...
Page 212: ...Peterbilt Motors Company P O Box 90208 Denton Texas 76202 ...