1994 HONDA INTEGRA Oil pan

The Automatic Transmission is a combination of a 3-e,ement torque convefter and triple-shaft electfonically controlled
automatic transmission which provides 4 speeds forward and 1 speed reverse. The entire unit is positioned in line with
the engine.
Torque Converter, Gears and Clutches
The torque converter consists of a pump, turbine and stator assembly in a single unit, The torque converter is connected
to the engine crankshaft so they turn together as a unit as the engine turns. Around the outside of the torque converter
is a ring gear which meshes with the starter pinion when the engine is being staned. The entire torque converter assem-
bly serves as a flywheel while transmitting power to the transmission mainshaft.
The transmission has three parallel shafts, the mainshaft. countershaft and sub-shaft. The mainshatt is in line with the
engine crankshaft.
The mainshaft includes the clutches for 1 st, and 2ndl4th, and gears for 3rd. 2nd, 4th, reverse and l st (3rd gear is in-
tegral with the mainshaft, while reverse gear is integral with the 4th gear).
The countershaft includes the 3rd clutch and gears Ior 3rd, 2nd,4th, reverse, lst and parking. Reverse and 4th gears
can be locked to the countershaft at its center, providing 4th gear or reverse, depending on which way the selector is moved.
The sub-shaft includes the lst-hold clutch and gears for 1st and 4th
The gears on the mainshait are in constant mesh with those on the countershaft and sub-shaft. When certain combina-
tions of gears in the transmission are engaged by the clutches, power is transmitted from the mainshaft to the counter-
shaft via the sub-shatt to provide @, E, tr. tr and @ position.
Electronic Control
The electronic control system consists of the Transmission Control Module {TCM), sensors, and 4 solenoid valves. Shift-
ing and lock-up are electronically controlled for comfortable driving under all conditions.
The TCM is located below the dashboard, behind the left side kick panel on the driver's side.
Hydraulic Control
The valve bodies include the main valve body, secondary valve body, regulator valve body. servo body, and lock-up valve
body throuqh the respective separator plates.
They are bolted on the torque converter housing.
The main valve body contains the manual valve, 1-2 shift valve, 2-3 shift valve, Clutch Pressure Cont.ol (CPC) valve,
4th exhaust valve, relief valve, and oil pump gears.
The secondary valve body contains the 4-3 kick-down valve,3-2 kick-down valve,2-3 orifice cont.ol valve, 3-4 shitt
valve, orifice control valve. modulator valve, and servo control valve
The regulator valve body contains the pressure regulator valve. lock-up control valve, torque converter check valve, and
cooler check valve.
The servo bodv contains the servo valve which is integrated with the reverse shift fork, throttle valve B, and accumulators.
The lock-ug valve bodv contains the lock-up shift valve and lock-up timing B valve. and is bolted on the secondary valve
body.
Fluid from the regulator passes through the manual valve to the various control valves.
Shitt Control Mochanism
Input to the TCM i.om various sensors located throughout the car determines which shift control solenoid valve should
be activated.
Activating a shift control solenoid valve changes modulator pressure, causing a shift valve to move. This pressurizes
a line to one of the clutches. engaging that clutch and its corresponding gear.
Lock-up Mechanism
In @ position. in 2nd, 3rd and 4th, and E position in 3rd, pressurized tluid can be drained from the back of the tor-
que converter through an oil passage, causing the lock-up piston to be held against the torque converter cover. As this
takes Dlace, the mainshaft rotates at the same speed as the engine crankshatt. Together with hydraulic control, the TCM
optimizes the timing ol the lock-up mechanism.
The lock-up valves control the range of lock-up according to lock-up control solenoid valves A and B, and throttle valve B
When lock-up control solenoid valves A and B activate, modulator pressure changes. Lock-up control solenoid valves
A and B are mounted on the torque converter housing, and are controlled by the TCM.
(cont'd)
14-3

NOTES
A.See flushing procedure, page l4-168 and 169.
B.Set idle rpm in gear to specitied idle speed. lf still no good, adiust motor mounts as outlined in engine
section of service manual.
lf the large clutch piston O-ring is broken, inspect the piston groove for rough machining.
lf the clutch pack is seized or is excessively worn, inspect the other clutches Jor wear, and check the
orifice control valves and throttle valves for free movement.
E.It throttle valve B is stuck, inspect the clutches for wear.
lf the 1-2 shift valve is stuck closed, the transmission will not upshift. lI stuck open, the transmission
has no lst gear.
H.lf the 2-3 orifice control valve is stuck, inspect the 2nd and 3rd clutch packs for wear.
ll the orifice cont.ol valve is stuck, inspect the 3rd and 4th clutch packs for wear.
lf the clutch Dressure control valve is stuck closed, the transmission will not shilt out of 1st gear.
K.improper alignment or main valve body and torque converter housing may cause oil pump seizure. The
symptoms ale mostly an rpm-related ticking noise or a high-pitched squeak.
L.ll the ATF strainer is ctogged with panicles of steel or aluminum, inspect the oil pump and ditferential
pinion shaft. lt both are OK and no cause lor the contamination is found, replace the torque converter.
M.lf the 1st clutch feedpipe guide in the right side cover is scored by the mainshaft, inspect the ball bear-
ing for excessive movement in the transmission housing. lf OK. replace the right side cover as it is dent-
ed. The O-ring under the guide is probably worn.
N.ReDlace the mainshstt if the bushing for the 4th feedpipe is loose or damaged.
It the 4th feedpipe is damaged or out ot tound, replace the right side cover'
Replace the subjshaft it thtbushing for the 1st-hold Jeedpipe is loose or damaged.
lf the 1st-hold feedpipe is damaged or out of round, replace it.
Replace the mainshaft if the bushing lor the 1st feedpipe is loose or damaged.
lf the lst feedpipe is damaged or out ot round, replace it.
o.A *o- r, da."s"d "p-g clutch is mostly a result of shifting the transmission in El or Lq! position
while the wheels rotate in reverse, such as rocking the car in snow.
P.InsDect the frame for collision damage.
o.Inspect for damage or wear:
1. Reverse selector gear teeth chamfers.
2. Engagement teeth chamters of countershaft 4th and reverse gear.
3. Shift fork for scutt marks in center.
4. Differential Dinion shaJt for wear under pinion gears.
5. Bottom of 3rd clutch for switl marks.
Replace items 1 , 2, 3 and 4 it worn or damaged. lf transmission makes clicking, grinding or.whirring
noise, atso replace mainshaft 4th gear and reverse idler gear and countershaft 4th gear in addition to
1,2,3ot4.lf ditiersntial Dinion shaft is worn, overhaul differential assembly, and replace ATF strainel, and thoroughly
clean transmission, tlush torque convertet, cooler and lines.
lf bottom of 3rd clutch is swirled and transmission makes gear noise, replace the countershaft and tinal
driven gear.
R.Be wry careful not to dsmage the torque converter housing when replacing the main ballbearing. You
may al;o damage the oil pump when you torque down the main valve body. This will result in oil pump
seizure it not detected. Use proper tools.
qInstall the main seal tlush with the torque converter housing, lf you push it into the torque converter
housing until it bottoms out. it will block the oil return passage and result in damage.
T,Harsh do\/vnshiJt"\./l,'hen coasting to a stop with zero th.ottle may be caused by a bent-in throttle valve
retainer/cam stopper. Throttle cable adjustment may clear this problem.
ifuitle cable adjustment is essential for proper operation of the transmission. Not only does it affect
the shift points if misad,usted, but also the shift quality and lock-up clutch operation'
A cable adjusted too long will result in throttle pressure being too low for the amount of engine torque
input into ihe trsnsmission and may cause clutch slippage. A cable adjusted too short will result in too
hi;h throttle pressure which may cause harsh shitts, erratic shrfts and torque con
14-89

Pressure Testing
a While testing, be caretul of the rotating flont wheels.a Make aura litts, jacks, and sat€ty stands alo placedplop6rly {see section 1}.
CAUTION: Betore t€sting, be sure the transmission fluidis tilled to rh6 ploper l€vet.
1. Raise the car (see section i),
2. Warm up the engine {the cooling fan comes onl, thenstop the engine and connect a tachometer.
3. Connect the oil pressure gauge to each inspectionholels).
TOROUE: 18 N.m (1.8 kgf.m, 13 tbf.fr)
CAUTION: Connect ths oil prsssure gauge s€cur€_ly; be sule not to allow dust and other foleign pani_cl6s to 6nt€1 th€ inspection holo.
A/T OIL PRESSURE GAUGESET WPANEL07406-002oi+oo
A/T LOW PRESSUREGAUGE W/PANEL07/rO6-0O70300
A/T OIL PRESSURE HOSE,22'10 mmOTMAJ_PY4OI TA{4 Roquirod)
A/T OIL PRESSUBE HOSEADAPTEROTMAJ - PY/+O12014 Roqui.odl
NOTE: Use the A/T Oil Pressure Gauge Set (07406_O02OOO3) or A/T Low Pressure Gauge (07406-OOTO0OO). and the oil pressure gauge hoses and adap_ters shown above.
14-94
4. Start the engine, and measure the respective pres-
sure as follows.
a Line Pressure
a Clutch Pfessure
a Clutch Low/High Pressure
a Throttle B Pressure
5. Install a new washer and the sealing bolt in the in-spection hole and tighten to the specified torque.
TOROUE: 18 N'm {1.8 kgf.m, 13 tbf.ft)
NOTE: Do not reuse old aluminum washers.
a Line Pressure M€asurement
- 1 . Set the parking brake and block both rear wheelssecurely.
-2. Run the engine at 2,OOO rpm
-3. Shift the selecr lever to S or @ position.
-4. Measure line pressure.
LINE PRESSUREINSPECTION HOLE
NoTE: Higher pressures may be indicated it measurements are made in selector positions other than @ or @ position.
PRESSURESELECTOR
POStTTONSYMPTOMPROBABLE CAUSEFLUID PRESSURE
StandardService Limit
LineNo'ENo (or low)
lrne pressureTorque converter,
orl pump, pressure
regulator, to.que
convener check
valve
83O-88O kPa(8.5-9.O kgf/cm,,
120- I 30 psi)
78O kPa
{8.0 kgl/cm,, 1lO psi}

Regulator Valve Body
Disassembly/lnspection/Reassembly
NOTE:
a Clean all pans thoroughly in solvent or carburetor cleaner, and dry with compressed ait.a Blow out all passages.
a Replace valve body as an assembly it any parts are worn or damaged.a Check all valves for free movement. lf any fail to slide freely, see Valve Body Repair on page 14-117.
1. Hold the .egulator spring cap in place while removing the lock bolt. Once the bolt is removed. release the spring
cap slowlv.
CAUTION: The .egulator spring c8p can pop out whsn the lock bolt is removod.
2. Reassembly is in the reverse order of the disassembly procedute.
NOTE:
. Coat all pans with ATF.
a Align the hole in the regulator spring cap with the hole in the valve body, press the spring cap into the body andtighten the lock bolt.
LOCK.BOLT6 x 1.0 mm12 N.m (1.2 kgl.m, 8.7 lbf.ftl
REGULATOR SPRING CAP
COOLER CHECK
OOWEL PINS, 2
ROLLER
SPRING SPECIFICATIONS
Unit of length: mm (in)
../
I',.-2" ll"%=
VALVE SLEEVE
t,-V
,*6t'"
REGULATOR VALVE
REGULATOR VALVE BODY
No.Spring
Standard (New)
Wiro Dia.o.D.Free LonglhNo. of Coils
o/a
@
\9/
Regulator valve spring A
Regulator valve spring B
Stator reaction spring
Lock-up control valve spring
Cooler check valve spring
Torque converter check valve spring
1.80 (O.O71)
1.80 (0.071)
5.50 (O.2171
o.80 (o.o31)
1 .10 (0.043)
1 .10 (O.O43t
14.70 (O.5791
9.60 (0.378)'26.40 (1.O39)
6.60 (O.260)
8.40 (O.331)
8.40 (0.331)
88.60 (3.488t
44.OO t't.7321
30.30 (1 .1 93t
39.50 (1.555)
33.80 (1 .331 I
33.80 (1 .331 )
16.5
2.1
25.O'l2.5
12.5
14-122
lnside Diameter

1st-hold Accumulator/Right Side Cover
Disassembly/lnspection/Reassembly
NOTE:
a Clean all pans thoroughly in solvsnt o, carburetor cleaner, and dry with compressed 8ir.
a Blow out all passages.
a coat all parts with ATF betors raassembly.
SNAP RI]TG
l ST.HOLO ACCUMULATOR COVER
1ST-HOLD ACCUMULATOR SPRING
IST.HOLD ACCUMULATOR PISTON
RIGHT SIDE COVER
O.BINGR6place.
SPRING SPECIFICATIONSUnit of length: mm (in)
No.Spring
St8ndard lt{ew)
Wlro Dia.o.D.Froo LengthNo. of Coils
o1 st-hold accumulator spring4.00 (o.1 57)21.50 (0.846)71.70 l2.A23l8.3
14-128

Tapered Roller Bearing Replacement
NOTE:
a The tapered roller bearing and bearing outer race
should be replaced as a set.
a Inspect and adjust the tapered roller bearing preload
whenevef the tapered rollef bearing is replaced.
a Check the tapered roller bearings tor wear and rough
rotation. lf tapered roller bearings are OK, removal is
not necessary.
1. Remove the tapered rolle. bearings using a bearing
puller and bearing separator as shown,
BEARING
BEARII{GSEPANATOR(Commercially
available)
Install new tapered roller bearings using the special
tool as shown.
NOTE: Drive the tapered roller bearings on until they
bottom against the differential carrier.
oilSealRemoval
1.Remove the differential assembly.
Remove the oil seal from the transmission housing.
3. Remove the oil seal from the clutch housino.
15-13

Steering Gearbox
Reassembly lcont'd)
Vllvc Body Rea3sombly
1. Apply vinyl tape to the stepped portion of the pin-
ion shaft, and coat the surface of the vinyl tape with
the power steering tluid,
2. Install the backup ring with its tapered side as
shown below.
3. Coat the inside surface of the new valve oil seal
with power steering fluid.
4. Slide the valve oil seal over the pinion shaft. being
careful not to damage the sealing lip.
CAUTION: ln3tall the valve oil ssal with hs groovad
3ide tacing opposits the besring.
Vinyl trpolst.ppcd ponion,Tapered position.
Groove side.
VALVE OIL SEAL
Fit the new O-ring in the groove of the pinion shaft.
Then slide the new valve seal ring over the shaft
and groove in on the pinion shaft.
Remove the vinyl tape from the pinion shaft.
NOTE: Do not over - expand the valve saal ring.
S€aling
E
lip
PINION SHAFT
VALVE SEAL RING
17-54
7. Apply power steering fluid to the surface of the
valve seal ring that was installed on the pinion
shaft.
8. Apply power steering fluid to the inside of the spe-
cial tool. Set the larger diameter end of the special
tool over the valve seal ring.
9. Move the special tool up and down several times to
make the valve seal ring Jit in the pinion shaft.
10. Remove the special tool.
.11. Turn the special tool over and setthe smallerdiam-
eter end of the special tool over the valve seal ring.
Move the sDecial tool uD and down severai times to
make the valve seal ring snugly fit in the pinion
shaft.
VALVE SEAL RING
(H(ffi
Use the wider diameterend ot the specialtool first to makethe valve seal ringfit in the pinionshaft.
Make the valve seal ringsnugly fit in the.pinionshaft using the other end(smaller diameter end) ofthe specialtool.

Apply power steering fluid to the surface of the spe-
cial tool. Set the new seal rings over the special tool
from the smaller diameter end of the tool, and
expand the seal rings. Do two rings at a time from
each end of the sleeve,
NOTE:
. Do not over-expand the seal ring. Install the resin
seal rings with care so as not to damage them.
After installation, be sure to contract the seal
rings using the specialtool {sizing tool}.
. There are two types of sleeve seal rings: black
and brown. Do not mix the different types of
sleeve seal rings as they are not compatible.
Set the special tool in the grooves in the sleeve. and
set each ring in each groove securely.
NOTE: After installation, compress the seal rings
with your fingers temporarily.
BALL JOINT BOOT CLIP GUIDEo?MAG - SL001d)
14. Apply power steering fluid to the seal rings on the
sleeve and to the entire inside surface of the special
tool.
15. Insert the sleeve into the specialtool slowly.
16. Move the sl€eve each direction several times to
make the seal rings snugly fit in the sleeve.
NOTE: Be sure that the seal rings are not turned up.
SLEEVE SEAL RINGSIZING TOOL
13.
07974 - 5450200
Cutout,
't7.Apply power steering fluid to the surface ol the pin-
ion shaft, then assemble the sleeve over the pinion
shaft, aligning the locating pin on the inside of the
sleeve with the cutout in the shaft,
NOTE: Be careful not to damage the valve seal ring
when inserting the sleeve.
Install the circlip securely in the pinion shaft groove.
NOTE: Install rh€ circlip with its tapered side facing
OUI.
19. Apply power steering fluid to the seal ring lip of the
valve oil seal. Then install the seal in the valve
housing using a hydraulic press and special tools as
shown.
18.
ATTACHMENT,32x35mm077{6 - 0010100
{cont'd)
VALVE OIL SEAL
17-55
ir