engine HONDA CR-V 1998 RD1-RD3 / 1.G Workshop Manual

12. Disconnect the heated oxygen sensor (HO2S) con-
nector, then remove the exhaust pipe A.
GASKETReplace.
HO2S CONNECTOR
NUTReplace.
EXHAUST
SELF.LOCKINGReplace.
GASKETReplace.
Mark reference marks on the joint of the transfer
and the propeller shaft.
8 x 1.25 mmReplace.
Separate the propeller shaft from the transfer
assemDly.
REFERENCE MABKS
14.
15. Remove the cotter pins, and castle nuts. then sepa-
rate the ball ioints from the lower arm (see sectlon
18).
OAMPER PINCH BOLT
CASTLE NUTNUTReplace.
17.
16.
DAMPER FORKFOFKEOLTReplace.
Remove the right damper tork bolt, then separate
right damper fork and damPer.
Pry the right driveshaft out of the differential, and
pry the left driveshaft out of the intermediate shaft
(see section 18).
Pull out the inboard ioint, and remove the right and
left driveshaft (see section 18).
Tie plastic bags over the driveshatt ends. Coat all
precision finished surfaces with clean engine oil
18.
19.
\
{cont'd}
13-9
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Transmission Assembly
Removal (cont'd)
20. Remove the intermediate shaft.
21.Tie plastic bags over the both ends of the intermedi-
ate shaft. Coat all precision finished surfaces withclean engine oil.
Remove the rear engine stiffene. and clutch hous-Ing cover.
13-10
23. Remove the right front mounvbracket.
RIGHT FRONTMOUNT/BRACKET
Place a jack under the transmission, raise it just
enough to take it off of the mounts, then remove
the transmission mount bracket and transmission
mount.
TRANSMISSION MOUNT
MOUNT BRACKET
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25. Remove the transmission mounting bolts and the
rear engine mounting bolts.
REAR ENGINE MOUNTING BOLTSReplace.
TRANSMISSION
Pull the transmission away from the engine until it
clears the mainshaft, then lower it on the transmis-
sion jack.
NOTE: Take care not to bend the clutch line.
Remove the starter motor and hose clamp from the
transmission housing.
STARTERMOTOR
28. Remove the release tork boot. release bearing, and
release fork from the clutch housing
RELEASEBEANING
13-1 1
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Transmission Assembly
1.
Installation
Check that the dowel pins are installed in the clutch
housing.
Apply grease to the release fork and release bear-
ing.
{P/N 08798 - 90021{P/N 08798 - 9002)0.{ - 1.0 g
{0.0'l - 0.04 ozl
RELEASEBEARING
(P/N 08798 -
9002)
RELEASEFORKBOOT
?
(P/N 08798 - 9002)'1.0 - 1.6 g {0.0,1- 0.06 o2l
Install the release bearing, release fork, and release
fork boot to the clutch housing.
Install the starter motor and hose clamp.
10 x 1.25 mm4{ N'm (4.5 kgf.m,32 tbf.ftl
13-72
HOSE
5. Place the transmission on the transmission jack,
and raise it to the engine level.
6. Install the transmission mounting bolts and the rear
engine mounting bolts.
TRANSMISSIONMOUNTING EOLT12 x 1.25 mn
7.
64 N.m {6.547 tbt.ft)
REAR ENGINE MOUNNNG BOLTSReplace.Itl x 1.5 mm8:l N.m 18.5 kgt m, 61 lbf.ft)
Rise the transmission, then install the transmission
mount bracket and transmission mount.
. Torque the mounting bolts and nuts in thesequence shown.
. Check that the bushing are not twisted or offset.
O. @: 12 x 1.25 mm
64 N.m (6.5 kgf.m, 47 lbf'ft)
O: Temporary tightening
@: 12 x 1.25 mm
74 N.m (7.5 kgf'm,54 lbf.ft)
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8. Installthe right front mounvbracket.
12 x 1 .25 mm64 N.m (6.5 kgf'm,47 tbf.ftlReplace.
RIGHT FRONTMOUNT/BBACKET
10 x 1.25 mm4,a N.m (4.5 kgf m,
33 tbf ftl
Install the clutch housing cover and rear engine
stiffener.
6xl0mm12 N.m 11.2 kgt.m.8.7 tbf.ft)
HOUSING
'12 x 1.25 mm29 N.m 13.0 kgf.m. 22 lbf'ft)
8 x 1.25 mm24 N.m {2.5 kgf'm'
18 tbl.ft)
10 x 'l .25 mm44 N.m {4.5 kgf m,33 lbf ftl
10. Pour transmission fluid of 1 liter from the driveshaft
inserted hole.
1 1. lnstall the intermediate shaft {see section 18). While
installing the intermediate shaft in the differential.
be sure not to allow dust and other foreign particles
to enter the transmission.
10 r 1.25 mm39 ttm 14.0 kgf.m,29 tbt ftlSET RINGReplace.
12. lnstall the driveshafts (see section 18). While
installing the driveshaft(s) in the differential, be sure
not to allow dust and other foreign panicles to enter
the transmission.
SET RINGReplace.
(cont'd)
13-73
INTERMEOIATE SHAFT
DRIVESHAFT
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Description
General Operation
The Automatic transmission is a 3-element torque converter and triple-shaft electronically controlled unit which provides 4
speeds forward and 1 reverse speed The unit is positioned in line with the engine'
There are two tvoes of automatic transmission on CR-V; the four-wheel drive (4WD) model ('97 - 00)' and the front-wheel
drive (2WD) model ('98 - 00).
Toroue Converter, G€ars, 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 crankshatt. These parts 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 started. The torque converter assembly serves as a fly-
wheel while transmitting power to the transmission mainshaft.
The transmission has three parallel shafts: the mainshaft. the countershaft, and the sub-shaft. The mainshaft is in line with
the engine crankshaft. The mainshaft includes the 1st, 2nd. and 4th clutches, and gears lor 3rd,2nd,4th. reverse and 1st
(3rd gear is integral with the mainshaft, while reverse gear is integral with the 4th gear). The countershaft includes the 3rd
clutch and gears for 3rd,2nd, 4th, reverse, 1st, and park. Reverse and 4th gears can be locked to the countershaft at its cen-
ter, providing 4th gear or reverse, depending on which way the selector is moved. The sub-shaft includes the lst-hold
clutch and gears for lst and 4th.
The gears on the mainshaft are in constant mesh with those on the countershaft and sub-shaft. When certain combinations
of gears are engaged by the ctutches, power is transmitted from the mainshaft to the countershaft to provide E, D!, tr, tr,
and E position ('97 - 98 models). and E. E, E, and E position ('99 - 00 models)'
Electlonic Control
The electronic controt system consists of the Powenrain Control Module (PCM), sensors, a linear solenoid, and four
solenoid valves. Shifting and lock-up are electronically controlled for comfortable driving under all conditions. The PCM is
located below the dashboard, under the kick panel on the passenger's side.
Hydraulic Control
The valve bodies include the main valve body, the secondary valve body, the regulator valve body, the servo body, and
the lock up valve body. They are bolted to the torque converter housing. 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
bodv contains the pressure regulator valve, the torque converter check valve, the cooler relief valve, and the lock-up con-
trol valve. The servo body contains the servo valve which is integrated with the reverse shift tork, 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 con-
trol solenoid valve Ay'B are bolted to the outside of the transmission housing, and the lock-up control solenoid valve Ay'B is
bolted to the outside of the torque converter housing. Fluid trom the regulator passes through the manual valve to the
various control valves. The clutches receive fluid from their respective feed pipes or internal hydraulic circuit
ShiftControl Mechanism
input from various sensors located throughout the vehicle determines which shift control solenoid valve the PCM will acti-
vate. 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
controlled by the PCM.
Lock-up Mechanism
tn E! position (,97 - 98 modets) and in E position ('99 - O0 models), in 3rd and 4th, and in Del position in 3rd ('97 - 98
models) and in El position with Over,Drive (O/D) is OFF (by pressing rhe O/D switchl in 3rd ('99 - 00 models), 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 speed 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 the 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
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Description
General Operation (cont'dl
Gsar Selection'97 - 98 Models
The shift lever has seven positions; El PARK, ts REVERSE, N NEUTRAL, Ell 1st through 4th ranges, lpq 1st th.ough 3rdranges, P 2nd gear, and [ 1st gear
'99 - 00 Models
The shitt lever has six positions; El PARK, E REVERSE, E NEUTRAL. E ,lst through 4th ranges, and 1st through 3rd(when Over-Drive (O/D) is OFF) ranges. @ 2nd gear, and E 1st gear.
Starting is possible only in @ and @ positions. using a slide-type. neutral-safety switch.
Automatic Transaxle (A/T) Gear Position IndicatorThis indicator in the instrument panel shows which gear has been selected.
Transler Mochanism {4WD}
The transfer mechanism consists of the transfer shaft drive gear. the transfer shaft. the transfer drive gear, the transfer driv-en gear shaft, and the companion flange, The transfer mechanism assembly is on the rear side ot the transmission. besidethe differential. The transfer shaft drive gear on the final driven gear drives the transfer shaft driven qear. power is transmit-ted to the rear differential via the transfer shaft and the Drooeller shaft.
Clutches
The four-speed automatic transmission uses hydraulically-actuated clutches to engage or disengage the transmission gears.When the 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 transmifted through the engaged clutch pack to its hu$mounted gear. When hydraulic pressure is bled from the clutch pack, the piston releases the friction discs and steel plates, andthey are free to slide past each other. This allows the gearto spin independently on its shaft, transmitting no power.
lst Clutch
The 1st clutch engages/disengages lst gear, and is located at the end ofthe mainshaft, just behind the end cover.The 1st clutch is supplied hydraulic pressure by its ATF feed pipe within the mainshaft.
lst-hold Clutch
The 1st-hold clutch engages/disengages 1st-hold or E position, and is located at the middle of the sub-shaft. The 1st-holdclutch is supplied hydraulic pressure by its ATF feed pipe within the sub-shaft.
2nd Clutch
The znd ciutch engages/disengages 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 circuit connected to theinternal hydraulic circuit.
PositionDescription
Reverse; reverse selector engaged with countershaft reverse gear and 4th clutch locked.
Allclutches released.
General driving; starts off in 1st, shifts automatically to 2nd, 3rd, then 4th, depending on vehicle speedand throftle position. Downshifts through 3rd,2nd, and lst on deceleration to stop.The lock-up mechanism operates;n 3rd and 4th gear.
used for rapid €cceleration at highway speeds and general driving; stans off in 1st, shifts automatically to2nd_then 3rd, dejending on vehicle speed and throttle position. Downshifts through lower gears on decel-eration to stop. The lock-up mechanism comes into operation in 3rd gear.
Driving in 2nd_gear; stays in 2nd gear, does not shift up and down. For engine braking or better trac_tion starting off on loose or slippery surfaces.
Driving in 1st gear; stays in 1st gear, does not shift up. For engine braking.
tll PARK
t!!l l|EvEn>E
E NEUTRAL
Ell DRrvE ('97 - sB)E DRrvE ('ss - oo)(1st through 4th )
E DRrvE {'97 - s8)O DRTVE with over-Drive (O/D) is OFF('99 - 00)(1st through 3rd)
E SECOND
E FIRST
14-4
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E Po3ition
Hydraulic pressure is not applied to the clutches. Power is not transmitted to the countershaft.
The countershaft is locked by the park pawl interlocking the park gear,
E Position
Engine power transmitted from the torque converter drives the mainshaft. but hydraulic pressure is not applied to the
clutches. Power is not transmitted to the countershaft. The countershaft 4th gear is engaged with the reverse selector hub
and the countershaft by the reverse selector, when the shift lever is shifted in E position from E or E position. The
countershaft reverse gear is engaged when shifted from E position.
NOTE; The illustration shows the 4WD automatic transmission; oower flow of the 2WD automatic transmission is identi-
cal to the 4WD exceDt for oarts related to the transfer assemblv.
PARK GEAR
SELECTOR
(cont'd)
COUNTERSHAFTREVEBSE GEAR
14-7
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2.
L
E Position
The power flow when decelerating is as follows:
Rolling resistance trom the road surface goes through the tront wheels (and rear wheels: 4WD) to the final drive gear.
then to the sub-shaft lst gear via the 4th gear. and 1st-hold clutch which is applied during deceleration.
The one-way clutch is free because the application of torque is reversed.
The counterforce conveyed to the countershaft 4th gear turns the sub-shaft 4th gear via the mainshaft 4th gear. Since
hydraulic pressure is also applied to the 1st clutch. counterforce is also transmitted to the mainshaft. As a result,
engine braking can be obtained with'lst gear.
NOTE: The illustration shows the 4WD automatic transmission; power flow of the 2WD automatic transmission is identi-
cal to the 4WD except tor parts related to the transfer assembly.
J.
SUB.SHAFT 1ST GEAR
TOROUE CONVERTER
FINAL DRIVE GEAR
SUB.SHAFT{TH GEAR
MAINSHAFTlST GEAR
lST CLUTCH
MAINSHAFT
COUNTERSHAFT
REVERSE SELECTOR HUB
REVERSE SELECTOR
COUNTERSHAFTIITH GEAR
FINAL ORIVEN GEAR
TRANSFER SHAFT DRIVE GEAR {4WDI
TRANSFEB SHAFT {{WD){cont'd}
lST.HOLD CLUTCH
TRANSFER DRIVEN GEAR SHAFT {,lWDl
14-9
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Description
Power Flow lcont'd)
lst Gear (8. E or E positionl
In E, E, or D position, the optimum gear is selected from 1st, 2nd, 3rd, and 4th gears, according to conditions such as
the balance between throttle opening (engine load) and vehicle speed.
1. Hydraulic pressure is applied to the 1st clutch, which rotates together with the mainshaft, and the mainshaft 1st gear
rotates.
2. Power is transmitted to the countershaft 1st gear. which drives the countershaft via the one-way clutch.
3. Power is transm itted to the final drive gear.which drives the final driven gear and the transfer shaft drive gea r (4WD).
4. The transfer shaft drive gear drives the transfer shaft and the transfer driven gear shaft (4WD).
NOTE:
o In @, @, @, or E position. hydraulic pressure is not applied to the 1st-hold clutch.. The illustration shows the 4WD automatic transmission; power flow of the 2WD automatic transmission is identicalto the 4WD except for parts related to the transfer assembly.
CONVERTERMAIiISHAFT1ST
CLUTCH
MAINSHAFT
COUNTERSHAFT
FINAL OBIVE GEAR
ONE.WAY CLUTCH
PARK GEAR
FINAL DRIVEN GEAR
14-10
TRANSFER SHAFT DRIVE GEAR {4WD}
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