transmission CHEVROLET KODIAK 2007 User Guide

The engine idle speed will return to normal once
the following conditions are met:
•Once engine coolant temperature reaches
about 150°F (65°C).
•The intake temperature reaches a
certain level.
The high idle speed will be temporarily interrupted
and the engine speed will return to normal if
any of the following conditions occur:
•The brake pedal is applied.
•The accelerator pedal is pressed.
•The automatic transmission is shifted out of
PARK (P) or NEUTRAL (N).
•The clutch pedal on the manual transmission
is pressed.
•Vehicle speed is detected.
Once these conditions no longer exist, the engine
idle speed will slowly increase to high idle after
the normal delay, if the conditions for engine
coolant temperature and air intake temperature
are still met.
Engine Checks Before Operating
When you have started your engine, let it run for
20 to 30 seconds before you put a load on the
engine. But do not leave the vehicle while
the engine is running.
Avoid unnecessary idling of diesel engine
equipped vehicles.
If the engine idles too long, the temperature of the
engine coolant will fall below the normal operating
range. Low engine operating temperature
causes several conditions which affect engine
operation and reduce engine life.
The engine should be permitted to go through a
warm-up period. Operate the vehicle at a minimum
of 600 rpm during the warm-up period. During
this period and during operation, the following
observations should be made.
During this warm-up period, check your warning
lights and gages:
•If oil pressure does not begin to rise within
15 seconds of starting, stop the engine
and find the cause. SeeOil Pressure Gage on
page 175for more information.
109

Diesel Engine Exhaust Brake
If your vehicle has a Isuzu 6H or Caterpillar®
Diesel Engine, it may have an exhaust brake,
which is located in the exhaust system.
If your vehicle has a 6.6L DURAMAX
®6600
Diesel Engine, it may have an exhaust brake,
which is controlled through the turbocharger.
The exhaust brake for both engines operates
the same.
The exhaust brake
switch is located in the
instrument panel
switchbank.
Push the bottom of the switch to turn the exhaust
brake on. When you push the top of the switch,
the exhaust brake will turn off.
There is an indicator light on the instrument panel
similar to the symbol on the switch, that will come
on when the exhaust brake is active. SeeExhaust
Brake Indicator Light on page 178for more
information.When using the exhaust brake, the proper gear
range selection is important. The exhaust brake will
be most effective if the gear range selected is the
lowest possible range that does not allow the
engine rpm to go more than 200 rpm above rated
(full load) rpm. If you have a Caterpillar®Diesel
Engine, do not exceed 2900 rpm. If you have a
Isuzu 6H Diesel engine, do not exceed 2550 rpm.
If you have a DURAMAX
®6600 Diesel Engine, do
not exceed 3600 rpm.
If your vehicle has an Allison
®
1000/2200/2300/2500 series automatic
transmission and press this button, the
transmission will downshift to a factory default
setting of third gear. To change the default setting,
or for more information on factory default
settings, contact your dealer for assistance.
The accelerator and clutch pedals must be
released in order for the exhaust brake to engage.
The exhaust brake will automatically shut off
when the anti-lock brake system is active.
If your vehicle has a Caterpillar
®Diesel Engine or
a DURAMAX®6600 Diesel Engine, the exhaust
brake will become active in cruise control
when you exceed the set speed by 3 to 5 mph.
112

Two-Speed Rear Axle Electric
Shift Control
If your vehicle has this feature, you will find a label
on the headliner above the windshield or in
another place near the driver that shows how to
use it. Be sure to follow the directions carefully.
Use the following directions based on the type of
shift control the vehicle has.
The rear axle shift
control switch for a
manual transmission
is located on the
shift lever.
When the switch is down, the rear axle is in the
high range. When the switch is up the rear axle is
in low range. Push or pull the switch to change
the range.The two-speed axle control should be in the up
position or low range when you park the vehicle.
You will need to engage the transmission and
move the vehicle a little to assure the axle is in the
low range. Then apply the parking brake, shift
into NEUTRAL and shut off the engine.
Also, always start the vehicle in motion with the
two-speed axle in the low range.
To shift up from low to high, do the following:
1. Move the switch down for the high range.
2. Disengage the clutch.
3. After a brief pause, engage the clutch and
then press down on the accelerator pedal
until the axle engages.
To shift down from high to low, do the following:
1. Release the accelerator and move the
switch upward for low range.
2. Press the accelerator pedal slowly until the
axle engages.
113

Air Shift Control (Automatic
Transmission)
The rear axle shift
control switch for an
automatic transmission
is located in the
instrument panel
switchbank.
To use the rear axle shift control, press the bottom
of the switch to get to the high range. The
switch indicator light will come on when the vehicle
is in the high range. Press the top of the switch
to return to the low range.The two-speed axle should be in low range when
you park the vehicle. You will need to engage
the transmission and move the vehicle a little to
assure the axle is in range. Then shift into
PARK (P), apply the parking brake, and shut off
the engine.
To shift up from low to high range while driving,
press the bottom of the rear axle shift control
switch as you are releasing the accelerator pedal.
After the shift has occurred, apply the accelerator
as desired.
To shift from high to low range while driving, press
the top of the rear axle shift control switch as
you release the accelerator pedal. Press the
accelerator pedal slowly until the down shift has
occurred, then apply the accelerator as desired.
For better performance during off-road or under a
heavy load, shift the axle into low range and
then operate the transmission normally.
For better performance on the highway, shift the
axle to high range and operate the transmission
normally.
114

Automatic Transmission Operation
We build vehicles with Allison®five and
six-speed automatic transmissions. This part of
the manual covers the basics of these. With these
transmissions, you will find another Allison
®
manual in your vehicle that goes into more detail.
On the headliner, in front of and above the
driver, or in some other place near the driver, you
will see a label that describes important operating
facts about the automatic transmission in your
vehicle. Make sure you follow the instructions on
this label.
Be sure to keep your parking brake set until you
are ready to shift into DRIVE (D), and press
the brake pedal while shifting from NEUTRAL (N)
or PARK (P) to a drive gear.
All vehicles equipped with automatic transmissions
can be started in PARK (P), if equipped, or in
NEUTRAL (N). See the Allison
®Transmission
Operator’s Manual in your vehicle for more
information about this.
{CAUTION:
It can be dangerous to get out of your
vehicle without the parking brake rmly
set. Your vehicle can roll. If you have left
the engine running, the vehicle can move
suddenly. You or others could be injured.
To be sure your vehicle will not move,
even when you are on fairly level ground,
always set the parking brake.
{CAUTION:
Shifting into a drive gear while your
engine is running at high speed is
dangerous. Unless your foot is rmly on
the brake pedal, your vehicle could move
very rapidly. You could lose control and
hit people or objects. Do not shift into a
drive gear while your engine is running at
high speed.
115

Overdrive Defeat
If your vehicle has this feature, you can select not
to shift up to fifth gear. This is useful when
towing or under a heavy load.
The overdrive defeat
switch is located in
the instrument panel
to the right of the
steering column.
Press the switch to limit the transmission to
fourth gear. This will allow for fewer downshifts
while pulling a trailer or under a heavy load.
The indicator light in the switch will come on
whenever overdrive defeat is active.
Manual Transmission Operation
Using the Clutch
When you are starting to move the vehicle, it is
important to begin with the engine speed at idle.
Then start to engage the clutch and listen for an
engine speed drop of about 100 rpm. At this point,
the clutch is engaging, so you should increase the
engine speed and fully engage the clutch. It is
important not to increase the engine speed sooner
or before the clutch begins its engagement. If you
do, you can cause damage to your vehicle.
Double-Clutching
You must use the double-clutching method when
you shift an unsynchronized gear set. Disengage
the clutch, shift to NEUTRAL and engage the
clutch. When upshifting, slow the engine until the
engine rpm and road speed match. When
downshifting, accelerate the engine until the
engine rpm and road speed match. Then quickly
disengage the clutch and move the shift lever
to the next gear position and engage the clutch.
116

Eaton®Fuller®Five and Six-Speed
Transmissions and TTC Spicer
Seven-Speed Transmissions
These transmissions have gears that automatically
synchronize when you shift up or down (except
FIRST (1) gear on the five-speed and seven-speed
transmission which is unsynchronized). Choose
the gear that will maintain the road speed you want
while keeping the engine above two-thirds of the
governed speed. When the engine speed
drops below two-thirds of the governed speed,
shift into the next lower gear before your engine
begins to lug. When you shift down, be sure
to double-clutch if required.
Eaton®Fuller®Nine and Ten-Speed
Non-Synchronized Manual
Transmissions
If your vehicle has one of these transmissions the
engine rpm and road speed must match when
upshifting and downshifting. The label above the
windshield will tell you the operating basics
you need to know.
The following are driving tips.
•Always choose an initial starting gear suitable
for the load and terrain.
•Always use double-clutching procedures when
shifting.
•Never move the range shift lever to the
LO speed gear position after HI range
preselection, or anytime the transmission is in
the HI range.
•Never move the range knob or lever with the
shift lever in NEUTRAL while the vehicle is
moving.
•Never make a range shift while moving in
REVERSE (R).
117

Clutch Brake (Vehicles with
Non-Synchronized Transmission)
A clutch brake is used to stop transmission input
shaft rotation so that FIRST (1) or REVERSE (R)
gear selection can be initiated when the vehicle is
at a standstill and the engine is idling.
Press the clutch pedal all the way down to the
floorboard to apply the clutch brake.
When using the clutch brake, disengage the clutch
pedal and shift the transmission into either the
initial starting gear or REVERSE (R). If the
tooth-butting occurs between the clutching teeth,
re-engage the clutch while applying light pressure
to the shift lever. This will provide for a smooth
shift into either FIRST (1) or REVERSE (R) gear.
Notice:Using the clutch brake for shifting
into any gear other than FIRST (1) or
REVERSE (R) may cause premature wear of
the clutch brake and make gear shift effort
more difficult. Do not use the clutch brake for
shifting after engaging FIRST (1) or
REVERSE (R).
Power Take-Off (PTO)
If your vehicle is
equipped for the
addition of a PTO, this
factory installed
switch will be located in
the instrument panel.
When the PTO switch is in the ON position,
engine speed is limited to maximum PTO speed if
PTO is activated during driving; therefore
limiting overall vehicle speed.
Before using a PTO, refer to the manufacturer’s or
installer’s instructions.
118

4n(Four-Wheel Low):This setting sends
maximum power to all four wheels. You might
choose Four-Wheel Low if you are driving off-road
in deep sand, deep mud, and climbing or
descending steep hills. Be sure the front wheel
hubs are locked when you want to drive in
Four-Wheel Low.
{CAUTION:
Shifting the transfer case to NEUTRAL
can cause your vehicle to roll even if the
transmission is in PARK (P). You or
someone else could be injured. If you are
going to leave your vehicle, set the
parking brake and shift the transmission
to PARK (P) and make sure the transfer
case is in a drive gear.Notice:If your vehicle has an Allison
®
transmission and you try to put the
transmission in PARK (P) while the transfer
case is in Four-Wheel Low, the transmission
might not go into PARK (P) and could damage
your vehicle. When parking your vehicle,
make sure the transfer case is in Two-Wheel
High or Four-Wheel High.
NEUTRAL:Shift the vehicle’s transfer case to
NEUTRAL only when towing your vehicle.
Shifting Into Four-Wheel High
Turn the knob to four-wheel high. This can be
done at 3 mph or less, while you are shifting out
of Four-Wheel Low. The indicator light flashes
while shifting. It remains on after the shift is
complete. Be sure to lock your front hubs.
121

Shifting Into Two-Wheel High
Turn the knob to Two-Wheel High. This can be
done at 3 mph or less, while you are shifting out of
Four-Wheel Low.
Shifting Into Four-Wheel Low
To shift to Four-Wheel Low, the vehicle’s engine
must be running and the vehicle must be stopped
or moving less than 3 mph (5 km/h) with the
transmission in NEUTRAL (N). The preferred
method for shifting into Four-Wheel Low is to have
your vehicle moving 1 or 2 mph (1.6 to 3.2 km/h).
Turn the knob to Four-Wheel Low. You must
wait for the Four-Wheel Low indicator light to stop
flashing and remain on before shifting the
transmission into gear. Be sure to lock the
front hubs.Notice:Shifting the transmission into gear
before the Four-Wheel Drive Low indicator light
has stopped ashing could damage the
transfer case. To help avoid damaging your
vehicle, always wait for the Four-Wheel
Drive Low indicator light to stop ashing
before shifting the transmission into gear.
If you turn the knob to Four-Wheel Low while your
vehicle is in gear and/or moving, the Four-Wheel
Low indicator light flashes for 30 seconds and
does not complete the shift unless your vehicle is
moving less than 3 mph (4.8 km/h) and the
transmission is in NEUTRAL (N). After 30 seconds,
the transfer case returns to the setting last
chosen. If your vehicle is in gear and moving less
than 3 mph (4.8 km/h), the transfer case shifts
to Four-Wheel High.
122