1994 HONDA INTEGRA Piston ring

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

Servo Body
Disassembly/lnspection/Reassernbly
NOTE:
a Clean all pSrts thotoughly in solvent or carbu.etor cleaner, and dry with compressed air.a Blow out all passages.
a Replace valve body as an assembly it any parts are worn or damageo.a Coat all parts with ATF before resssemblv.a Replace the O-rings.
\P
@
Replace.
THROTTLE CAMSYOPPER
O-RINGReplace.4THPISTON
6 r 1.O mm12 N.m(1.2 kgf.m,8.7 rbt.ftl
SERVO BODY
THROTTLEVALVE B
I
o
THROTTLE ADJUSTIIIIG BOLTCAUTION: Do not loo3on or
O-RINGReplace.
3RD ACCUMULATORPISTON
i'rlll
V8;lilSl
LONG VALVE
14-126

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

Clutch
lllustrated Index
3RD CLUTCH
CLUTCHDRUMO-RINGSReplace.
CLUTCH DISCSStsndard thickness:1.94 mm {0.076 in)
CLUTCH PISTON
DISC SPRING
RETURN SPRING
SPRING RETAINERSNAP RING
1ST CLUTCH
SNAP RING
CLUTCH ENDPLATE
O-RINGSReplace.
CLUTCH PLATESStandard thicknass:2.00 mm {0.079 in}
(cont'd)
SNAP RING
SNAP RING
CHECK VALVE
14-141

Clutch
lllustrated Index (cont'd)
2ND/4TH CLUTCH
SNAP RING
SPRING RETAINER
RETURN SPRING
CLUTCH END PLATE
4TH CLUTCH DRUM
CLUTCH PLATESStanda.d thickness:2.00 mm 10.079 in)
SNAP RING
CLUTCH DISCSStandard thickno3s:1.94 mm 10.076 in)
CLUTCH END PLATE
;;i;;; /
(/\
Y)
)
l
CLUTCH PISTON
CLUTCH PLATESStandard thickness:2.OO mm 10.079 inl
SPRING
RETURN SPRING
RETAINER
SNAP RING
CLUTCH DISCSStsndard ihickn€ss:1.94 mm 10.076 in)
CHECK VALVE
SNAP RING
14-142

lST.HOLD CLUTCH
SNAP RING
CLUTCH END PLATE
CLUTCH DISCSStandard thicknoss:1.94 mm 10.076 inl
DISC SPRING
CLUTCH PISTON
O-RINGSRoplace.
CLUTCH PLATESStandard thickno3si2.00 mm (0.o79 in)
14-143

CAUTION: lf either end ot the comprassol attachm€nt
is sel ovsl an araa ol the spdng retaine. which is unsup-
ported by the retum spring. the letainer may be damag6d,
4. Compress the return spring.
Do not set horo.
RETURN SPRING
5.Remove the snap ring. Then remove the special
tools, spring retainer and return spring.
Wrap a shop towel around the clutch drum and ap-
ply air pressure to the oil passage to remove the
piston. Place a finger tip on the other end while ap-
plying air p.essure.
6.
COMPRESSED AIRHOSE NOZZLEOSHA-approved 30 psirype onry
CLUTCH
S AP RING
PISTON
14-145