automatic transmission HONDA INTEGRA 1994 4.G Owner's Manual

Description
(cont'd)
Gear Selection
The selector lever has seven posirions; E PARK, E REVERSE, N NEUTRAL, @ 1st through 4th positions. E 1st
through 3rd positions, Ql2nd gear and [] 1st gear.
Starting is possible only in @ and I Oosition through use ot a slide-type, neutral-safety switch.
Automatic Tlansaxle {A/T) Gear Position Indicatol
A/T gear pos;tion indicator in the instrumenl panel shows what gear has been selected without having look down at
the console.
Position Description
l3?]] PARK Front wheels locked; parking pawl engaged with parking gear on countershatt. All clutches
reteaseo,
[R] REVERSE Reverse; reverse selector engaged with countershalt reverse gear and 4th clutch locked.
N NEUTRAL All clurches released.
D+l DRIVE General driving; starts off in 'lst, shifts automatically to 2nd, 3rd, then 4th, depending on vehicle
('lst through 4th) speed and throttle position. Do'vnshifts through 3rd, 2nd and 1st on deceleration to stop.
The lock-up mechanism comes into operation in 2nd, 3rd and 4th when the transmission in lDtposrtron.
Dgi DRIVE For rapid acceleration at highway speeds and general driving; starts off in 1st. shifts automatical-(1st through 3rd) ly to 2nd then 3rd, depending on vehicle speed and throttle position. Downshifts through lower
gears on deceleration to stop. The lock-up mechanism comes into operation in 3rd.
El SECOND Driving in 2nd geari stays in 2nd gear, does not shift up and down.
For engine braking or better traction starting off on loose or slippery surfece.
L]l FIRST Driving in 1st gear; stays in lst gear, does not shilt up.
For engine braking.
14-4

Description
Clutches
The four speed automatic transmission uses hydraulically actuated clutches to engage or disengage the transmission gears.
When clutch pressure is introduced into the clutch drum, the clutch piston is applied. This presses the iriction discs and
steel plates together, locking them so they don't slip. Power is then transmitted through the engaged clutch pack tojts hub-mounted gear.
Likewise, when clutch pressure is bled from the clutch pack. the piston releases the friction discs and steel plates, and
they are {ree to slide past each other while disengaged. This allows the gear to spin independently on its shaft, transmit-
ting no power.
1st ClutchThe l st clutch engages/disengages 1st gear, and is located at the end of the mainshaft, just behind the right side cover.
The 1st clutch is supplied clutch pressure by its oil feed pipe within the mainshaft.
1st-hold clutchThe 1st-hold clutch engages/disengages 1st-hold or I Fosition, and is located at the center ol the sub-shaft. The 1st-
hold clutch is supplied clulch pressure by its oil feed pipe within the sub-shait.
2nd ClutchThe 2nd clutch engages/disengages 2nd gear, and is located at the center of the mainshaft. The 2nd clutch is joined
back-to-back to the 4th clutch. The 2nd clutch is supplied clutch pressure through the mainshaft by a circuit connected
to the regulator valve body.
3rd Clutch
The 3rd clutch engages/disengages 3rd gea.. and is located at the end oJ the countershaft, opposite the right side cover.
The 3rd clutch is supplied clutch pressure by its oil feed pipe within the countershaft,
4th clurch
The 4th clutch engages/disengages 4th gear. as well as reverse gear, and is located at the center of the mainshaft.
The 4th clutch is joined back-to-back to the 2nd clutch. The 4th clutch is supplied clutch pressure by its oil feed pipe
within the mainshalt.
One-way Clutch
The one-way clutch is posjtioned between the parking gear and 1st gear. with the parking gear splined to the counter-
shaft. The 1st gear provides the outer race, and the parking gear provides the inner race surface. The one-way clutch
locks up when power is transmitted from the mainshaft 1st gear to the countershaft lst ggel _The 1st clutch and gears remain engaged in the 1st. 2nd. 3rd, and 4th gear ranges in the @, E or E position.
However, the one-way clutch disengages when the 2nd. 3rd, or 4th clutches/gears are applied in the E, lD.l o, Eoosttton.
This is because the increased rotational speed of the gears on the countershaft over-ride the locking "speed range" of
the one-way clutch. Thereafter, the one-way clutch free-wheels with the lst clutch still engaged.
COUNTERSHAFT 1ST GEAR
FREE
:>
LOCKS
aF
NOTE:View trom right side cover side.
14-6

. Ascending Contlol
When the TCM determines that the vehicle is climbing a hill in @ position, the system extends the engagement area
of 3rd gear to prevent the transmission Irom frequenrly shitting between 3rd and 4th gears, so the vehicle can run smooth
and have more power when needed.
NOTE: Shift schedules between 3rd and 4th gear are stored in the TCM to enable the transmission to automatically
select the most suitable gear according to the magnitude of a gradient by Fuzzy logic.
. Descending Control
When the TCM determines that the vehicle is going down a hill in @ position. the shift-up speed from 3rd to 4th gear
when the throttle is closed becomes taster than the set speed for tlat road driving to widen the 3rd gear driving area.
This, in combination with engine brake from the deceleration lock-up, achieves smooth driving when the vehicle is
descending.
There are two ascending modes with different 3rd gear driving areas according to the magnitude of a gradient stored in
the TCM.
When the vehicle is in 4th gear, and you are decelerating on a gradual hill, or when you are applying the brakes on a
steep hill, the transmission will downshitt to 3rd gear. When you accelerate the transmission will then return to 4th gear.
F
0
. Deceleration Control
Vohicle SDood
When the vehicle goes around a corner, and needs to decelerate first and then accelerate, the TCM sets the data for
deceleration control to reduce the number of times the transmission shifts to obtain smooth driving. When the vehicle
is decelerating from speeds above 27 mph (43 km/h). the TCM shifts the transmission from 4th to 3rd earlier than normal
to cope with upcoming acceleration to maintain smooth driving.
NOTE:
Fuzzy Logic: Fuzzy logic is a from at artificial intelligence that lets computers respond to changing conditions much like
a human mind would.
14-21

E Position
As the engine turns, the oil pump also starts to operate. Automatic transmission fluid (ATF) is drawn from (99) and dis-
charged into (1 ). Then, ATF pressure is controlled by the regulator valve and becomes line pressure ( 1 ). The torque con-
verter inlet pressure (92) enters (94) of torque converter through the orifice and discharges into {90}.
The torque converter check valve prevents the torque converter pressure from rising'
Under this condition, the hydraulic pressure is not applied to the clutches.
NOTE:. When used, "left" or "right" indicates direction on the llowchart
. SOL-@: Shift Control Solenoid Valve A
' SOL{D:Shift Control Solenoid Valve B
. SOL@: Lock-up Control Solenoid Valve A
. SOL-@: Lock-up Control Solenoid Valve B
(cont'd)
14-29

Fluid Level
Checking/Changing
Checking
NOTE: Check the fluid level with the engine at normal
operating temperature (the cooling lan comes on).
1. Park the car on level ground. Shut otf the engine.
2. Remove the dipstick (yellow loop) from the trans-
mission, and wipe it with a clean cloth.
3. Insert the dipstick into the transmission.
DIPSTICK (YELLOW LOOPI
4. Remove the dipstick and check the fluid level.
should be between the uoDer and lower marks.
P
il
\---
T
lf the level is below the lower mark, add fluid into
the tube to bring it to the upper mark. Use Honda
Premium Formula Automatic Transmission Fluid or
anequivalentDEXRON@ llAutomaticTransmission
Fluid (ATF) only.
lnse.t the diDstick back into the transmission.
IT
{J. UPPER MARK
t)-i- LowER MARK
5.
6.
Changing
1. Bring the transmission up to operating temperature
by driving the car. Park the car on level ground, turn
the engine oft, then remove drain plug.
NOTE: lf a cooler flusher is to be used, see page
14-168 and 169.
2. Reinstail the drain plug with a new sealing washer,
then refillthe transmission to the upper mark on the
dipstick.
Automatic Transmission Fluid Capacity:
2.1 | l2.S US qt, 2.4 lmp qt) at change
5.9 ? (6.2 US qt, 5.2 lmp qt) at overhaul
18 x 1.5 mm49 N.m (5.0 kgl.m, 36 lbl.ft)
TRANSMISSION RIGHT SIDE COVER
14-93

Transmission
Removal {cont'd)
7. Remove the transmission housing mounting bolts.
Remove the drain plug and drain the automatic trans-
mission tluid (ATF). Reinstall the drain plug with anew sealing washer lsee page 14-93).
DRAIN PLUG18 x 1.5 mm49 N'm 15.0 kgt-m,36 tbt-fr)
9. Remove the splash shield.
6 x 10
CLIPS pcs.
10. Remove the cotter pins and castle nuts, then
separate the balljoints from the lower arm {see sec-
tion 18).
11. Remove the right dampe. fork bolt. then separate
right damper fork and damper.
PINCI{ BOLT
SELF.LOCKINGNUTReplace.COTTER PINReplace.
/\
14-100
DAMPER FORK
CASTLE NUT

Differential
Manual Transmission
81881 engine
818C1 engine .......
Automatic Transmission ..................
15-1
15-9
15-19

Differential (Automatic Transmissionl
Special Tools ........ ........ 15-20
Differential (Automatic Transmission)
flfustrated Index......... .15-21
Backfash Inspection .... 15-22
Bearing Replacement ............... ..... 15-22
Differential Carrier Replacement .... 15-23
Oil Seaf Removal ........15-24
Oil Seal Installation/
Side Clearance ............. 15-24

Differential (Automatic Transmissionl
lllustrated Index
FINAL DRIVEN GEAR
BALL BEARING
--ttot"'
ENTIAL .ARRIER
ROLLER.5xlOmm
'-6
BALL BEARING
15-21

Differential (AutomaticTransmission)
Backlash InspectionBearing Replacement
1.Place the differential assembly on V-blocks and in-
stall both axles.
Check backlash of both pinion gears.
Standard (New): 0.05-O.15 mm (0.002-0.006 inl
3. lf backlash is out of tolerance, replace the differen-
tial carrier.
SIDE GEARS
NOTE: Check the bearings for wear and rough rotation.
lf the bearings are OK, removal is not necessary.
1. Remove the ball bearings using a bearing puller.
BEARING PULLER
Install the new ball bearings using the special tool
with a Dress as shown.
BALL BEAING
DRIVER, 40 mm l.D.07746 0030100
15-22