1998 HONDA CIVIC Pressure plate nm

NOTE:
. Use new O-rings when reassembling.
. Apply oil to O-rings before installation.
. Use liquid gasket, Part No 08718 - 0001 or 08718 -
0003.
. Clean the oil pan gasket mating surfaces before install-
Ing.
D16Y5, D16Y8 engines:
O.RINGReplace.
OIL PUMPOverhaul, Page 8 12
Inspection, Page 8 13 OOWEL PINApply liquid gasket
to the mating surface
of the block.
CAUTION: Do not overtightsn the drain bolt.
ENGINE OIL PRESSURE SWITCH18 N,m l'1.8 kgf.m, 13 lbf.ftl
1/8 in. ESPT (British
Standard Pipe Taper)28 Threads/inch. useproper liquid sealant.
O-RING
OIL BREATHERCHAMBER
6x1.0mm11 N.m {1.1 kgf.m,I tbt'ftl
6 x'1.0 mm11 N.m ('1.1 |8 tbf.ft)
GASKETReplace.
FILTERReplacement, page 8_8
BAFFL€ PLATE
6x1.0mm11N.m 11.1 kgl.m,8 tbf.ftl
6x1.0mm11 N.m 11.1 kg{'m,
8 rbf.ftl
OIL PANGASKETFeplace.
OIL PANReler to page 7 26when installing.
\3
6x1.0mm12 N.m {1.2 kg{.m,8.7 lbf ftl
BOLT39 N.m (4.0 kgf.m.29lbtftlDo not overtighten.
\
8-5

J
t
Clutch
Speciaf Tools .......... ...........12-2
f lfustrated Index .......... ......12-3
clutch Pedal
Adjustment .................... 12'4
Clutch Master Cylinder
Removal/lnstallation ..... 12-5
Slave Cylinder
Removal/lnstallation .....12'6
Pressure Plate
Removal/lnspection ...... 12-7
Clutch Disc
Removal/lnspection ...... 12-8
Flywheel
Inspection ....................... 12-9
Replacement ....................................... 12-9
Clutch Disc, Pressure Plate
lnstallation ..................... 12-10
Release Bearing
Removal/lnspection ......12-11
f nstalfation .................,... 12-12
\

Pressure Plate
\Removal/lnsPection
1.Inspect the fingers of the diaphragm spring for wear
at the release bearing contact area.
Check the diaphragm spring fingers for height using
the special tools and a feeler gauge.
Standard {New}: 0.6 mm (0.02 inl max.
Seruice Limit: 1.0 mm {0.04 in}
FEELER GAUGE
CLUTCH ALIGNMENT DISCOTJAF_PM7O1 1ACLUTCH ALIGNMENT SHAFTOTJAF-PM7012AHANDLE07936-37tOtOO
lf the height exceeds the service limit, replace the
pressure Plate.
3. Installthe special tools
PRESSURE PLATE
MOUNTINGBOLT
ALIGNMENT SHAFTOTJAF-PM7012AHANDLE07936-371010Oo7924-PD20003GEAR HOLDER
07LA8-PVOOIOOot
ENGINEBLOCKADJUSTER BOLT
BOLT
4. To prevent warping, unscrew the pressure plate
mounting bolts in a crisscross pattern in several
steps, then remove the pressure plate.
f
12-7
lnspect the pressure plate surface for wear' cracks,
and burning.
Inspect for warpage using a straight edge and leeler
ga uge.
NOTEr Measure across the pressure plate at three
pornrs.
Standard (Newl: 0.03 mm (0.001 inl max.
Service Limit: 0.15 mm (0.006 inl
lf the warpage exceeds the service limit, replace the
pressure plate.
STBAIGHT EDGE

FlywheelClutch Disc, Pressure Plate
Replacement (cont'dl
4. Drive the new ball bearing into the flywheel using
the special tools as shown.
DRIVER07749-0010000
ATTACHMENT,32x35mm07746-OOIOTOO
FLYWHEEL
BEARING
Align the hole in the flywheel with the crankshaft
dowel pin and install the flywheel. Install the
mounting bolts finger-ti9ht.
Install special tool, then torque the flywheel mount-
ing bolts in a crisscross pattern in several steps as
snown.
5.
6.
MOUNTING BOLTS118 N.m (12.0 kgl.m,87 tbf.ft)
RING GEAR HOLDER07LAB-PV00100ol07924 -PO20003
WVa// ,
12-10
Installation
1. Install the special tool.
Y
07936-3710r00
{P/N 08798-90021
RING GEAR HOLDER07LAB-PVOO100ot07924-PD20003
CLUTCH ALIGNMENT SHAFTOTJAF_PM7012A
2.
3.
Installthe clutch disc using the special tools.
Install the pressure plate.
RING GEAR HOLDERoTLAB PV00'l OO
07924 PD20003
OTJAF_PM70124HANOLE07936-3710100
CLUTCH DISC

Description
The automatic transmission is a 3-element torque converter and a dual-shaft electronically controlled unit which provides
4 soeeds forward and 1 reverse.
Torque Convertel, Geats, and Clutches
The torque converter consists of a pump, turbine and stator, assembled in a single unit. They are 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 started. The entire torque converter assembly seryes as a
flywheel while transmiuing power to the transmission mainshaft.
The transmission has two parallel shafts: the mainshaft and the countershaft. The mainshaft is in Iine with the engine
crankshaft. The mainshaft includes the 1st, 2nd and 4th clutches, gears tor 2nd, 4th, reverse and lst (3rd gear is integral
with the mainshaft, while the reverse gear is integral with the 4th gear). The countershaft includes the 3rd clutch, and
gears for 3rd,2nd, 4th, reverse. 1st and park. The gears on the mainshaft are in constant mesh with those on the counter-
shaft. When certain combinations of gears in transmission are engaged by clutches. power is transmitted from the main-
shaft to the countershaft to provide E, ld, E, and E positions.
Electronic Control
The electronic control svstem consists of the Powertrain Control Module {PCM), sensors, a linear solenoid and four
solenojd valves. Shifting and lock-up are electronically controlled for comtonable driving under all conditions. The PCM is
located below the dashboard, under the front lower panel on the passenger's side
Hydraulic Control
The valve bodies include the main vatve body, the secondary valve body, the regulator valve body, the servo body and the
lock-up valve body through the respective separator plates, They are bolted on the torque converter housang
The main valve body contains the manual valve, the 1-2 shift valve. the 2nd orifice control valve, the CPB {Clutch Pressure
Back-up) valve, the modulator valve. the servo control valve, the relief valve, and ATF pump gears The secondary valve
body contains the 2-3 shift valve. the 3-4 shift valve, the 3-4 orifice control valve, the 4th exhaust valve and the CPC (Clutch
pressure Control) valve. The regulator valve body contains the pressure regulator valve, the torque converter check valve,
the cooler relief valve, and the lock-up control valve. The servo body contains the servo valve which is integrated with the
reverse shift fork, and the accumulators. The lock-up valve body contains the lock-up shift valve and the lock-up timing
valve. The linear solenoid and the shift control solenoid valve Ay'B are bolted on the outside of the transmission housing,
and the lock-up control solenoid valve Ay'B is bolted on the outside of the torque converter housing. Fluid from regulator
passes through the manual valve to the various control valves. The clutches receive fluid from their respective teed pipes
or internal hydraulic circuit.
Shift Control Mechanism
Input from various sensors located throughout the car determines which shift control solenoid valve the PCM will activate
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, The shift control solenoid valves A and B are con-
trolled by the PCM.
Lock-up Mechanism
In ,Dt1 position, in 3rd and 4th. and in E position in 3rd, pressurized fluid is drained from the back of the torque converter
through a fluid passage, causing the lock-up piston to be held against the torque converter cover. As this takes place, the
mainshaft rotates at the same as the engine crankshaft. Together with hydraulic control, the PCM optimizes the timing of
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 linear solenoid. When lock-up control solenoid valves A and B activate, the modulator pressure changes The lock-
up control solenoid valves A and B and the linear solenoid are controlled by the PCM.
(cont'd)
14-3

Description
(cont'dl
Gear Selection
The shift lever has six positions: E PARK. E REVERSE, N NEUTRAL, E 1st through 4th gear ranges, E 1st through 3rdgear ranges, @ 2nd gear.
Starting is possible only in E and E positions through the use of a slide-type, neutral-safety switch.
Automatic Transaxle (A/f, Gear Position Indicator
The Ay'T gear position indicator in the instrument panel shows which gear has been selected without having to look downat the console.
Clutch€s
The four-speed automatic transmission uses hydraulically-actuated clutches to engage or disengage the transmission gears.When hydraulic pressure is introduced into the clutch drum, the clutch piston moves. This presses the friction discs andsteel plates together, locking them so they don't slip. Power is then transmitted through the engaged clutch pack to itshub-mounted gear. Likewise, when the hydraulic pressure is bled from the clutch pack, the piston releases the friction discsand the steel plates, and they are free to slide past each other. This allows the gear to spin independently on its shaft,transmitting no power.
lst Clutch
The 1st clutch engages/disengages 1st gear, and is located at the end of the mainshaft, just behind the right sroe cover.The 1st clutch is supplied hydraulic pressure by its ATF feed pipe within the mainshaft.
2nd Clulch
The 2nd clutch engagegdisengages 2nd gear, and is located at the middle of the mainshaft. The 2nd clutch is joined
back-to-back to the 4th clutch. The 2nd clutch is supplied hydraulic pressure through the mainshaft by a circutr connect-ed to the internal hvdraulic circuit,
3rd Clutch
The 3rd clutch engages/disengages 3rd gear, and is located at the end of the countershaft. The 3rd clutch is suooliedhydraulic pressure by its ATF feed pipe within the countershaft.
ilth Clutch
The 4th clutch engages/disengages 4th gear, as well as reverse gear, and is located at the middle of the mainshaft. The4th clutch is joined back-to-back to the 2nd clutch. The 4th clutch is supplied hydraulic pressure by its ATF feed pipewith in the mainshaft.
\-a
PositionDe3cription
E PARK
E REVERSE
N NEUTRAL
E DRIVE
{1st through 4th)
Ei DRtvE('lst through 3rd)
B SECOND
Front wheels locked; park pawl engaged with pa* on countershaft. All clutches released.
Reverse; reverse selector engaged with countershaft reverse gear and 4th clutch locked.
All clutches released.
General driving; starts off in 1st, shifts automatically to 2nd, 3rd, then 4th, depending on vehiclespeed and throttle position. Downshift through 3rd, 2nd and 1st on deceleration to stop. The lock-upmechanism comes into operation in @ position in 3rd and 4th gear.
Use for rapid acceleration at highway speeds and general driving; up-hill and down,hill dfiving; stansotf in 1st, shifts automatically to 2nd, then 3rd, depending on vehicle speed and throttle position.
Downshifts through 2nd to lst on deceleration to stop. The lock-up mechanism comes into operationin 3rd gear,
Use for engine braking or better traction starting off on loose or slippery surfaces; stays in 2ndgear, does not shift up and down.
14-4

\
Lock-up System
Lock-up Clutch
1. Ooeration (clutch onl
with the lock-up clutch on, the fluid in the chamber between the torque converter cover and the lock-up piston is drained
off, and the converter fluid exerts pressure through the piston against the torque converter cover, As a result, the conven-
er turbine is locked to the convefter cover. The effect is to bypass the converter, thereby placing the vehicle in direct drive
LOCK.UP PISTONDAMPER SPRING
The power flows by way ot:
Engine
{
Drive plate
i
Torque converter cover
I
Lock-up piston
Damper spring
I
Turbine
Mainshaft
ODeration {clutch off}
With the lock-up clutch off, the fluid flows in the reverse of "clutch on." As a result, the lock-up piston moves away from
the converter cover, and the torque converter lock-up is releassd.
Engine
t
Drive plate
I
Torque convener cover
{
Pump
I
Turbine
Mainshaft
TOROUECOVER
(cont'd)
COI{VERTER
\
TURBNE
MAINSHAFT
14-33

Continuously Variable Transmission (CVTI
Special Tools ................ 14-194
Description .................... 14-195
Clutches/Reverse Brake/Planetary
Gear/Pulleys .......... 14-198
power Flow ..............,..... 14-200
Electronic Control SYstem(,96 - 98 Modets) ......14-203
Electronic Control System
('99 - oo Models) " 14-205
Hydraulic Control '....... 14-208
Hydraulic Flow .'..-.....'... '14-212
Park Mechanism .....-...'.' 14-222
Eleqtrical Systom
Component Locations'96 - 98 Models """"""' 14-224,99 - 00 Modets ............. 14-225
TCM Circuit Diagram ('96 - 98 Models) ............. 14-226
TCM Terminal Voltage/Measuring Condiiions ('96 - 98 Models) '.... 14-228
PcM Circuit Oiaqram{A/T Control System: '99 - 00 Models} ...--.... 14-230
PCM Terminal Voltage/Measuring Conditions('99 - 00 Models)
A/4 Control System .'.'...14-232
Troubleshooting Procedures ... . .... .....',........."' '14-234
Symptom-to-ComPonent Chart
Electrical System - '96 - 98 Models ......'..... '14-234
Electrical System -'99 - 00 Models ..'....-..-. '11-210
Electrical Troubleshooting
Troubleshooting Flowcharts('96 - 98 Models) """'11-242
Troubleshooting Flowchart
('99 - 0O Modets) ...... 14-265
Linear Solenoids/lnhibitor Solenoid
Test ......................... . ...... 14-29f
Drive Pulley/Driven Pulley/Secondary Gear
Shaft Speed Sensors
Replacement .........'...... .14-292
Start Clutch Control
Start Clutch Calibration Procedure ....... ....,. 14-293
Hydraulic SYstem
Symptom-to-ComPonent Chart
Hydraulic System '.'.......14-294
Road Test ............................ 14-296
Stall Speed
Test......................... ...... 14-294
Fluid Level
Checking/Changing ....... 14-299
Pressure Testing ................. 14-300
Lower Valve BodY AssemblY
Replacement ..........,... 14-302
ATF Filter
Removal/lnstallation ..... 14-303
Transmission
Transmission
Removal ........... . 14-304
lllustrated Index
Transmission/Lower Valve BodY
Assembly ................. 14-308
Transmission Housing/Flywheel Housing ... 14-310
End Cover/f ntermediate Housing ..........'.'.... 14-312
Transmission Housing/Lower Valve Body Assembly
Removal ..........'.... .. " 14-314
Transmission Housing/Flywhesl Housing
Removal ................. ........ 1+316
End Cover/lntermediate Housing
14-318Removal .........,...............
Manual Valve Body
Disassembly/lnspection/Reassemblv .'.'.'..... 1 4-320
Forward Clutch
lltustrated Index ........................................ 14-321
Disassemblv .................. 14-322
Reassemblv , ,, . ',','......14-324
Secondary Gear Shaft
25 x 35 mm Thrust Shim Selection ..'.'....-... 14-324
Differential
lllustrated lndex ...,.....................,.,...-.-.-...'... 14-329
Backlash Inspection .-....14-329
Bearing Replacement ......'........'....'... ....'... 14-330
Differential Carrier Replacement ........'........ 14-330
Oil Seal Removal ........... 14-331
Oil Seal Installation/Side Clearance ....... . . 14-331
Flywheel Housing Input Shaft Oil Seal
Replacement .....,.... ...'.'.. 14-333
Transmission Housing Bearings
Driven Pulley Shaft Bearing
Replacenient ...................'. . ...................'.. 14-334
Secondary Gear Shaft Bearing
Reolacbment ...................... . .......... . ........ 14-335
Flywheel Housing Beating
Secondary Gear Shaft BearingReo1acement..................,........................... 14-335
Ring Gear Bearing
Replacement......... ........ 14-336
Control Shaft Assembly
Removal/lnstallation ....................'........... 14-336
Transmission
Reassembly .................. 14-338
Flywheel/Drive Plate .. . ...... . ...... ... . ....-.....'.'...14-341
Transmission
lnstalation ..................... 14-348
Cooler Flushing .'......... 14-352
shift cable
Removal/lnstallation....'........." """ 14-354
Adjustment .......'........ 14-355
Shift Lever ........................,. 14'356
Shift Indicator Panel
Adjustment ................ 14-357
ATF Cooler/Hoses
lnsta llation ......,,...... .... 14-357