1994 ACURA INTEGRA Torque mount

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

Rcgulator Valve
The r€gulator valve maintains a constant hydraulic pressure from the oil pump to the hydraulic control system, whil€
alEo furnishing oil to the lubricating system and torque convener.
Oil flows through B and B'. The oil which enters through B flows thfough the valve orifice to A, pushing the regulator
valve to the right. Acco.ding to the level of hydraulic pressure through B, the position of the valve changes, and the
amount of the oil thlough D from B'thus changes. This operation is continued. thus maintaining the line pressure.
IEI{GINE ]IIOT RUNNINGI{ENGINE RUNNING)
Siator Reaction Hydtaulic Pressure Control
Hydraulic pressure increase, according to torque, is performed by the regulator vslve using stator torque reaction. Thestator shaft is splined to the stator and its a.m end contacts the fegulator spring cap. When the car is accelerating orclimbing (Torque Convener Range). stator torque reaction acts on the stator shalt and the stator shaft arm pushes thersgulator spring cap in this - direction in proportion to the reaction. The spring compresses and the regulator valve movesto increase the regulated control pressure or line pressure. Line pressure is maximum when the stator reaction is maximum.
TOR VALVE
(cont'd)
From OIL PUMP
STATOR SHAFTSTATOR SHAFT ARM
14-25

In E position in 2nd, 3rd and 4th, and @ position in 3rd, pressurized fluid is drained from the back of the torque con-
verter through an oil passage, causing the lock-up piston to be held against the torque converter cover. As this takes
place, the mainshaft rotates at the same speed as the engine crankshaft. Together with hydraulic control, the TCM op-
timized the timing ot the lock-up system. Under certain conditions, the lock-up clutch is applied during deceleration, in
3rd and 4th sDeed.
The lock-up system controls 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.
NOTE:
When used, "left" or " tight" indicates direction on the tlowchart.
LOCK IJP COIITBOL
Solenoid valve
L""f."p "."aiti""\B
Lock-up OFFOFFOFF
Lock-up, slightONOFF
Lock-up, halfONON
Lock-up. fullONON
Lock-up
during decelerationONDuty operation
OFF -ON
LOCI( UP TIMII{G B VAIVE
{cont'd)
ott coot€R
14-39

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

Transmission
Installation
1. Flush the ATF cooler as described on pages I4-168
thru 'l 69.
2. Install the starter motor on the transmission hous-
ing, then installthe l4 mm dowel pins in the torque
converrer nousrng.
STARTER MOTOR
O-RINGReplace.14 mm OOWEL PINTOROUECONVERTER
J.
TRANSMISSION HOUSINGMOUNTING BOLTS
59 N.m 16.0 kgf.m,43 lbl.ftl
Place the transmission on a transmission jack, and
raise to the engine level.
Attach the transmission to the engine, then install
the transmission housing mounting bolts and two
rear engine mounting bolts with new washers.
REAR ENGINEMOUNT BOLTS14 x 1.5 mm
45 N.m 14.5 kgf'm,
'14 mm DOWEL PIN
I
i.'l,i;
14-164
5. Install the transmission mount.
6. Install the transmission
12 x 1.25 mm64 N.m 16.5 kgl.m, 47 lbf.ft)
12 x 1.25 mm74 N.m 17.5 kgf'm,54 rbt'ft)
housing mounting bolts.
MOUNTING BOLTS12 x 1 .25 rnm74 N.m (7.5 kgf'm, 54 lbf.ftl
TRANSMISSION HOUSING

7.Remove the transmission jack.
Attach the torque converter to the drive plate with
eight bolts and torque:
Rotate the crankshatt as necessary to tighten the
bolts to 1/2 of the specilied torque, then to the final
toaque, rn a cnsscross pattern.
After tighten the last bolts, check that the crankshaft
rotates freely.
TOROUE: 12 N.m {1.2 kgl.m.8.7 lbf.ft}
Install the torque converte. cove. and engine
stiffener.
L
9.
6 r 1.O mm12 N.m 11.2 kgt.m, 8.7 lbl.ltl
10.
12 N.m 11.2 kgf.m,8.7 rbt.ft)
Tighten the crankshaft pulley bolt to specified
rorque.
TOROUE: 177 N.m {18.O kgt.m, 130 lbf'ft}
10 x 1.25 mm44 N'm {4.5 kgf.m.33 rbt'frl
8 x '1.25 mm24 N.m (2.4 kgl.m,17 tbf.trl
lO x '1.25 mm43 N.m14.4 kgf.m, 32 lbf.ltl
11. Connect the ATF cooler hoses to the joint pipes.
12. Connect the throttle control cable to the throttle con-
trol lever and install the right front mount/bracket.
THROTTLE CONTROL LEVERTHROTTLE CONTROLCABLE END
JOINT PIPES
12 x 1 .25 mm64 N.m {6.5 kgf.m,47 tbf.ftlReplace.
ATF COOLER HOSES10 x 1.25 mm RIGHT44 N.m (4.5 kgf'm, FRONT33 rbl.ftl MoUNT/BRACK€T
t5.Install the control lever with a new lock washer to
the control shalt. then install the shift cable cover.
CAUTION: Take care not to bend the shift cable.
CONTROLSHAFT
SHIFT CABLE
CONTROL LEVER
6 x 1.0 mm12 N.m{1.2 kgf.m,8.7 lbl.rr)
SHIFT CABLECOVER
LOCK6 x 1.0 mm14 N.m 11.4 kgl.m,10 lbf.fr)
(cont'dl
Replace.ASHER
14-165

41.
Install a puller yoke to the steering gearbox, then
clamp the puller yoke in a vise with soft jaws as
shown.
PULLER YOXE:Commcrcirlly AvrihbloSn.p-Ono T/N Cr123-lorco T/N 7372or aquivrlani
Grease the inside surface of the cylinder end, then
install the cylinder end by screwing it into the cylin-
der housing.
After tightening the cylinder end, stake the point of
the cylinder housing shown below.
NOTE: Stake in the cylinder in the position opposite
from where the stake was removed during disas-
semblv.
Strke point, D.pth: 1.0 mm (0.04 inl
4.0 mm 10.15 inlCYLINDER HOUSING
CYLINDER END
CYLINOER69 N.m 17.0 kgf.m, 51 lbtft)
,t8. Select the 32 mm shim(s).
NOTE: Only reinstall the original 32 mm shim(s)
when the steering gearbox is reassembled without
replacing the pinion shaft, valve housing, and gear-
box housing with new ones.
lf the pinion shaft, valve housing, and gearbox
housing are replaced, select the new shim{s) as fol-
rows.
Shim r€lection:-'1. Set the four 32 mm shims on the b€aring surface of
the gearbox housing. Total thickness of the four
shims should eoual no more than 0.70 mm.
Shim set: tour 32 mm shims (Thickness: 0.10 mm,
0.15 mm, 0.20, 0.25 mm respectivelyl
CAUTION: The tour 32 mm shimr do not hlva
thlckn$s idcntitication mukt. Mo!3ur. tho thicl-
oa33 of rach 3him using a miclomctrl, and mlrk
tho shim lor id6ntific8tion.
-2. Install the valve body unit on the gearbox, and
tighten the flange bolts to the specitied torque
VALVE BODY UNIT
FLANGE BOLT20 N.m {2.o kgtm, 14lbt'ftl
SHIM SET{foul thim.)
Measure the clearance between the gearbox and
valve body unit using a feeler gauge as shown.
NOTE: Measure the clearance at the point midway
between the two mounting bolts.
(cont'd)
17-59

Sub-t.ame Torque Sequence:
cAUTloN: After roosening tho rsar beam mounting borts be sura to repraco thom with new onea.
6 x 'l.O mm9,8 N.m (1.0 kgt.rn,7.2 tbt-fllREAB BEAM BBACE
FEAR BEAMCOLLAR
10 x 1.25 mm44 N.m {4.5 kgt.m,33 rbr.ftl
REAR BEAM
REAR BEAM14 x 1.5 mm89 tt.m (9.1 kst.m,66 lbf.ftlBeplace.
Sub-frame
20-165