2004 SUBARU IMPREZA engine

7-12
Starting and operating
Manual transmission – 6 speed (WRX-
STi)
The manual transmission is a fully synchromeshed 6-
forward and 1-reverse speed transmission.
The shift pattern is shown on the shift lever knob.
Do not drive the vehicle with the clutch disen-
gaged (i.e., when the clutch pedal is depressed)
or with the shift lever in the neutral position.
Engine braking has no effect in either of these
conditions and the risk of an accident is conse-
quently increased.
! Selecting reverse gear
1) Slider
You must raise the slider and hold it in that position be-
fore you can move the shift lever to the “R” position.
To change gears, fully depress the clutch pedal, move
the shift lever, and gradually let up on the clutch.
If it is difficult to shift into gear, put the transmission in
neutral, release the clutch pedal momentarily, and
then try again.
N3
4
1
2
5
6R
UG7503BA
1
UG7014BB

7-13
Starting and operating
– CONTINUED –
Shift into reverse ONLY when the vehicle has
completely stopped. It may cause damage to
the transmission to try shifting into reverse
when the vehicle is moving.
! Shifting speeds
! Recommended shifting speeds
The best compromise between fuel economy and ve-
hicle performance during normal driving is ensured by
shifting up at the speeds listed in the following table. !
Maximum allowable speeds
The following tables show the maximum speeds that
are possible with each different gear. The tachome-
ter’s needle will enter the red area if these speeds are
exceeded.
With the exception of cases where sudden accelera-
tion is required, the vehicle should not be driven with
the tachometer’s needle inside the red area. Failure to
observe this precaution can lead to excessive engine
wear and poor fuel economy.
When shifting down a gear, ensure that the ve-
hicle is not travelling at a speed exceeding the
Maximum Allowable Speed for the gear which
is about to be selected. Failure to observe this
precaution can lead to engine over-revving and
Shift up mph (km/h)
1st to 2nd 15 (24)
2nd to 3rd 25 (40)
3rd to 4th 40 (64)4th to 5th 45 (72)
5th to 6th 50 (80)
Gear mph (km/h)
1st 35 (57)
2nd 55 (88) 3rd 73 (118)4th 96 (154)

7-14
Starting and operating
this in turn can result in engine damage.
In addition, sudden application of engine
brakes when the vehicle is travelling on a slip-
pery surface can lead to wheel locking; as a
consequence, control of the vehicle may be lost
and the risk of an accident increased.
NOTE
Never exceed posted speed limits. !
Driving tips
Do not drive with your foot resting on the clutch pedal
and do not use the clutch to hold your vehicle at a
standstill on an upgrade. Either of those actions may
cause clutch damage.
Do not drive with your hand resting on the shift lever.
This may cause wear on the transmission compo-
nents.
When it is necessary to reduce vehicle speed due to
slow traffic, turning corners, or driving up steep hills,
downshift to a lower gear before the engine starts to
labor.
On steep downgrades, downshift the transmission to
5th, 4th, 3rd or 2nd gear as necessary; this helps to
maintain a safe speed and to extend brake pad life. In this way, the engine provides a braking effect. Re-
member, if you “ride” (over use) the brakes while de-
scending a hill, they may overheat and not work prop-
erly.
The engine may, on rare occasions, knock when the
vehicle rapidly accelerates or rapidly pulls away from
a standstill. This phenomenon is not an indication of a
problem in your vehicle.

7-15
Starting and operating
– CONTINUED –
Manual transmission – 5 speed (ex-
cept WRX-STi)
The manual transmission is a fully synchromeshed 5-
forward and 1-reverse speed transmission.
The shift pattern is shown on the shift lever knob.
When shifting from 5th gear to reverse gear, first re-
turn the shift lever to the neutral position then shift into
reverse gear.
To change gears, fully depress the clutch pedal, move
the shift lever, and gradually let up on the clutch pedal.
If it is difficult to shift into gear, put the transmission in
neutral, release the clutch pedal momentarily, and then try again.
Do not drive the vehicle with the clutch disen-
gaged (i.e., when the clutch pedal is depressed)
or with the shift lever in the neutral position.
Engine braking has no effect in either of these
conditions and the risk of an accident is conse-
quently increased.
Shift into reverse ONLY when the vehicle has
completely stopped. It may cause damage to
the transmission to try shifting into reverse
when the vehicle is moving.
! Shifting speeds
! Recommended shifting speeds
The best compromise between fuel economy and ve-
hicle performance during normal driving is ensured by
shifting up at the speeds listed in the following table.
135
24R
N
13524R
HS7008BA

7-16
Starting and operating
!
Maximum allowable speeds
The following table shows the maximum speeds that
are possible with each different gear.
Never exceed the speed limit below for each gear po-
sition except for brief acceleration in an emergency.
The tachometer’s needle (if so equipped) will enter the
red area if these speeds are exceeded. Failure to ob-
serve this precaution can lead to excessive engine
wear and poor fuel economy. 2.5 liter models (non-turbo)
mph (km/h)
2.0 liter models (turbo) mph (km/h)
When shifting down a gear, ensure that the ve-
hicle is not travelling at a speed exceeding the
Maximum Allowable Speed for the gear which
is about to be selected. Failure to observe this
precaution can lead to engine over-revving and
this in turn can result in engine damage.
Shift up mph (km/h)
1st to 2nd 15 (24)
2nd to 3rd 25 (40) 3rd to 4th 40 (65)4th to 5th 45 (73)
RS TS, OUTBACK
1st 29 (46) 28 (45)
2nd 48 (77) 47 (75) 3rd 68 (110) 66 (106)
WRX
1st 35 (56)
2nd 61 (98) 3rd 87 (140)

7-17
Starting and operating
– CONTINUED –
In addition, sudden application of engine
brakes when the vehicle is travelling on a slip-
pery surface can lead to wheel locking; as a
consequence, control of the vehicle may be lost
and the risk of an accident increased.
! Driving tips
Do not drive with your foot resting on the clutch pedal
and do not use the clutch to hold your vehicle at a
standstill on an upgrade. Either of those actions may
cause clutch damage.
Do not drive with your hand resting on the shift lever.
This may cause wear on the transmission compo-
nents.
When it is necessary to reduce vehicle speed due to
slow traffic, turning corners, or driving up steep hills,
downshift to a lower gear before the engine starts to
labor.
On steep downgrades, downshift the transmission to
4th, 3rd or 2nd gear as necessary; this helps to main-
tain a safe speed and to extend brake pad life.
In this way, the engine provides a braking effect. Re-
member, if you “ride” (over use) the brakes while de-
scending a hill, they may overheat and not work prop- erly.
The engine may, on rare occasions, knock when the
vehicle rapidly accelerates or rapidly pulls away from
a standstill. This phenomenon is not an indication of a
problem in your vehicle.

7-22
Starting and operating
the vehicle is completely stopped. Shifting
while the vehicle is moving may cause damage
to the transmission."
Do not race the engine for more than five sec-
onds in any position except the “N” or “P” po-
sition when the brake is set or the tires are on
blocks. This may cause the automatic transmis-
sion fluid to overheat. " Avoid shifting from one of the forward driving
positions into the “R” position or vice versa un-
til the vehicle has completely stopped. Such
shifting may cause damage to the transmis-
sion. !
Selector lever for automatic transmis- sion
P
RND321
HS7009AA

7-23
Starting and operating
– CONTINUED –
: With the brake pedal depressed, move the lever
along the gate.
: Move the lever along the gate.
The selector lever has seven positions. ! P (Park)
This position is for parking the vehicle and starting the
engine.
In this position, the transmission is mechanically
locked to prevent the vehicle from rolling freely.
When you park the vehicle, first set the parking brake
fully, then shift into the “P” position. Do not hold the ve-
hicle with only the transmission. A shift interlock function is employed in the automatic
transmission system to ensure safe starting of the ve-
hicle.
To shift the selector lever from the “P” to the any other
position, you have to depress the brake pedal fully
when the ignition switch is in the “ON” position. This
prevents the vehicle from lurching when it is started.
If the shift lever does not move from the “P” position
with the brake pedal depressed, refer to the “Shift lock
release” section in this chapter. !
R (Reverse)
This position is for backing the vehicle.
To shift from the “N” to “R” position, first stop the vehi-
cle completely then move the lever to the “R” position. ! N (Neutral)
This position is for restarting a stalled engine.
In this position the wheels and transmission are not
locked. In this position, the transmission is neutral; the
vehicle will roll freely, even on the slightest incline un-
less the parking brake or foot brake is on.
Do not drive the vehicle with the selector lever
in the “N” (neutral) position. Engine braking
HS7010BA