1998 HONDA CR-V Transmission assembly

4th Goar (E or D positionl
1. Hydraulic pressure is applied to the 4th clutch, which rotates together with the mainshaft, and the mainshaft 4th gear
rotates,
2. Power is transmitted to the countershaft 4th gear, which drives the countershaft.
3. Power is transm ifted to the f inal d rive gear, which drives the fina I driven gear and the transfer shaft drive gear (4WD).
4. The transfer shaft drive gear drives the transfer shaft and the transfer driven gear shaft {4WD).
NOTE:
. Hydraulic pressure is also applied to the 1st clutch, but since the rotation speed of 4th gear exceeds that of 1st gear,
power from 1st gear is cut off at the one-way clutch,
. The illustration shows the 4WO automatic transmission; power flow of the 2WD automatic transmission is identical
to the 4WD except for parts related to the transfer assembly.
ilTH GEAR
TOROUE CONVERTER
.TH CLUTCH
COU'{TERSHAFT
REVERSE SELECTOR HUB
REVERSE SELECTOR
FINAL DRIVEN GEAR
TRANSFEB SHAFT DRIVE GEAB I'WD)
TNANSFER SHAFT I4WDI{cont'd)
14-13
TMNSFER DRIVEN GEAR SHAFT (4WDI
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Description
Power Flow (cont'dl
E position
1. Hydraulic pressure is switched by the manual valve to the servo valve, which movss the reverse shift fork to the
reverse position, The reverse shift fork engages with the reverse selector, the reverse selector hub, and the counter-
shaft reverse gear.
2. Hydraulic pressure is also applied to the 4th clutch. Power is transmitted from the mainshaft reverse gear via the
reverse idler gear to the countershaft reverse gear.
3. Rotational direction ofthe countershaft reverse gear ischanged viathe reverse idlergear.
4. Power is transmitted to the final drivegear,which drivesthefinal d riven gear a nd the transfer shaft drive gesr (4WD).
5. The transfer shaft drive gear drives the transfer shaft and the transfer driven gear shaft (4WD).
NOTE: The illustration shows the 4WD automatic.transmission; power flow of the 2wD automatic transmission is identical
to the 4WD except for parts related to the transfer assembly.
TOROUE CONVERTERMAINSHAFT REVERSE
COUNTERSHAFT
FINAL ORIVE
REVERSE IDLERGEAR
COUNTERSHAFTREVERSE GEAR
REVERSE SEITCTORHUBREVERSE SELECTOR
REVEBSC SHIFTFORK
FINAL OBIVEN GEAR
TRANSFER SHAFT DRIVE GEAR{4WD)
TRANSFER SHAFT {4WD)SERVO VAI-VE
14-14
TRANSFER DRIVEN GEAR SHAFT I4WD}
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Description
Hydraulic Control
The hydraulic control system is controlled by the ATF pump, valves, accumulators, and electronically controlled solenoids.
The ATF pump is driven by splines on the end of the torque converter which is aftached to the engine. Fluid from the ATF
pump flows through the regulator valve to maintain specified pressure, through the main valve body, to the manual valve,
directing pressure to each clutch. The valve body includes the main valve body, the regulator valve body, the lock-up
valve body, the secondary valve body, the servo body, the linear solenoid, the shift control solenoid valve Ay'B assembly,
and the lock-up control solenoid valve A/B assembly. The shift control solenoid valve A,/B assembly and the linear
solenoid are bolted on the outside of the transmission housing. The lock-up control solenoid valve A,/B assembly is bolted
on the outside of the torque converter housing.
LINEAR
SHIFT CONTROLSOLENOID VALVE A/BASSEMBLY
SECONDARY VALVEBODY
REGULATORVALVE BOOY
VALVE BODY
SOLENOID VALVE A/BASSEMELY
N
ATF PUMP GEARS
14-24
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From page 14 82
Replace the Lock-up ControlSolenoid Valve Assembly andRecheck:1. Replace the lock-up controlsolenoid valve A/B assembly(see page 14-'135).2. Turn the ignition switch OFFand reset the PCM by remov-ing the BACK uP (7.5 A) fusein the under-hood fuse/relaybox for more than 10 seconds.3. lJsing the scan tool, check tobe sure that the engine coolanttemperature is 176"F 180'C) orabove,4. Drive the vehicle at 55 mph(88 km/h) constantly for moretnan one mrnute.5. Recheck for code P0740 (40).
Does the OBD ll scan tool indicatecode PO74O or doesthe El indicator light indicate code 40?The svstem is OK ai this time.
Replace the Linear Sol€noidA$embly and Recheck:'1. Beplace the linear solenoidassembly {see page 14-138).2. Turn the ignition switch OFFand reset the PCM memory byremoving the BACK UP (7.5 A)fuse in the underhood fuse/relay box for more than 10seconds.3. Using the scan tool, check tobe sure that the engine coolanttemperature is 176"F (80'C) orabove.4. Drive the vehicle at 55 mph (88
km/h) constantly for more thanone minute,5. Recheck for code P0740 {40).
Does the OBD ll scan toolindicate code P0740 or doesthe E indicator light indicate code 40?
The svsteo is OK at this tim€.
Replace the transmission andtorque convertor assembly.
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Mai nshaft /Cou ntershaft
Linear Solenoid AssemblySpeed Sensors
Replacement
'1. Remove the mounting bolts and the linear solenoid
assemblY.
Clean the mounting surfaceand fluid passages.
6x1.0mm12 N.m (1.2 kg{.m.8.7 tbtftl
@
@
GASKET
Clean the mounting surface and fluid passage of the
linear solenoid assembly and transmission housing.
Install a new linear solenoid assemblv with a new
gasket. Do not pinch the gasket during installation,
and make sure it is installed properly in the mount-
ing groove of the linear solenoid.
Check the linear solenoid connector for rust. dirt, or
oil, then connect it securelv.
14-138
Replacement
1. Remove the 6 mm bolt and the countershaft sDeed
sensor from the end cover.
\
5x1.0mm12 N.m 11.2 kgf.m, COUNTERSHAFT8.7 rbf.frl SPEED SENSOR
O.RINGReplace.
12 N'm 11.2 kgl.m,8.7 tbf.ftl
Remove the 6 mm bolt and the mainshaft speed
sensor from the transmission housing.
Replace the O-ring with a new one before installing
the countershaft speed sensor or the mainshaft speed
sensor,
6x1.0mm
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The following symptom can be caused
by improper repair or assemblYCheck these items
. lmproper clutch clearance
. lmproper gear clearance
One-way (sprag) clutch installed upside down
Park lever installed upside down
Shift fork bolt not installed
Vehicle creeps in N position.
Vehicle does not move in E, [D.lj, or E
position.
Transmission locks up in E position.
Excessive drag in transmission.ATF pump binding and seizure
Use proper tools when replacing the ATF pump gears, and be careful
to damage the ATF pump when torque down the main valve body.
Check that the shift fork bolt is installed on the shift fork shaft
not
Excessive vibration, rpm related.Torque converter not fully seated in ATF pump
Reverse selector hub installed upside downNoise only with wheels moving.
Mainshaft oil seal po9s out.Mainshaft oil seal improperly installed
lnstallthe mainshaft oil seal tlush with the torque converter housing lf
the mainshaft oil seal is installed into the torque converter housing until
it bottoms. it will block the fluid return passage and result in damage
Various shifting problems.. Springs improperly installed
. Valves improperly installed
Harsh upshift.Check valve balls not installed
(cont'd)
4-155
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Symptom-to-Com ponent Chart
Hydraulic System (cont'd)
NOTES
See flushing procedure, page l4-264 and 265,
BSet idle rpm in gear to specified idle speed. lf still no good, adjust motor mounts as outlined in enginesection of this manual.
clf the large clutch piston O-ring is broken, inspect the piston groove for rough machining.
Dlf the clutch pack is seized or is excessively worn. inspect the other clutches fot wear, and check the orificecontrol valves, CPC valve, and linear solenoid for free movement.
lf the linear solenoid is stuck, inspect the clutches for wear.
lf the 1-2 shift valve is stuck closed. the transmission will not upshift. lf stuck open, the transmission hasno lst gear.
Hlf the 2nd orifice control valve is stuck, inspect the 2nd and 3rd clutch Dacks for wear.
lf the 3-4 orifice control valve is stuck, inspect the 3rd and 4th clutch packs for wear.
Jlf the clutch pressure control valve is stuck closed. the transmission will not shift out of lst gear.
Klmproper alignment of main valve body and torque converter housing may cause ATF pump seizure. Thesymptoms are mostly an rpm-related ticking noise or a high-pitched squeak.
Llf the ATF strainer is clogged with particles of steel or aluminum, inspect the ATF pump and differentialpinion shaft. lf both are OK and no cause for the contamination is found, replace the torque converter.
Mlf the lst clutch feed pipe guide in the end cover is scored by the mainshaft. inspect the ball bearing forexcessive movement in the transmission housing. lf oK, replace the end cover as it is dented. The o-rinounder the guide is probably worn.
N' Replace the mainshaft if the bushing for the 4th feed pipe is loose or damaged, lf the 4th feed pipe is darrFaged or out of round. replace the end cover.' Replace the mainshaft if the bushing for the l st feed pipe is loose or damaged. lf the 1st feed pipe is dam-aged or out of round, replace it.
oA worn or damaged sprag clutch is mostly a result of shifting the transmission in E!. E, or E positionwhile the wheels rotate in reverse. such as rocking the vehicle in snow.
PInspect the frame for collision damage.
lnspect for damage and wear:
l. Reverse selector gear teeth chamfers.
2. Engagement teeth chamfers of countershaft 4th and reverse gear.
3. Shift fork for scuff marks in center.
4. Differential pinion shaft for wear under pinion gears.
5. Bottom of 3rd clutch for swirl marks.
Replace items 1, 2, 3. and 4 if worn or damaged. lf transmission makes a clicking, grinding, or whirring noise,also replace mainshaft 4th gear, reverse idler gear, and countershaft 4th gear in addition to 1,2, 3, or 4.lf differential pinion shaft is worn, overhaul differential assembly, replace ATF strainer, and thoroughly cjeantransmission, flush torque converter. cooler, and lines,lf bottom of 3rd clutch is swirled and transmission makes gear noise. replace the countershaft and final drivenoear,
Be very careful not to damage the torque converter housing when replacing the main ball bearing. you
may also damage the ATF pump when you torque down the main valve body. This will result in ATF pumpseizure if not detected. Use the Drooer tools.
SInstall the main seal flush with the torque converter housing. lf you push it into the torque converterhousing until it bottoms out, it will block the fluid return passage and result in damage.
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Transfer
4.
Inspection
@E Mako suro lifts, jacks, and safety standsare placod properly lsoe section t).
1. Raise the front of the vehicle, and make sure it issupported securely.
2. Set the parking brake, and block both rear wheelssecurely.
Shift to E position.
Make a reference mark across the propeller shaftand the transfer assembly flanges.
Separate the propeller shaft from the transferassembly.
8 x 1.25 mm32 N.m 13.3 kgl,m,24 lbf.ftlReplace.
14-164
\
6. Set a dial indicator on the transfer assembly flange.then measure the transfer gear backlash.
STANDARD: 0.06 - 0.16 mm (0.002 - 0.006 inl
7. lf the measurement is out of standard, remove thetransfer assembly and adjust transfer gear backlash{see page '14-232 thru 14-2491.
8. Check for fluid leaks between the mating faces oftransfer cover A and cover B.
9. lf there is a fluid leak, remove the cover, and reDlacethe O-ring.
'10. Check for fluid leaks between the mating face of thetransfer assembly and transmission.
11. lf there is a fluid l€ak, remove the transf€r assem-bly, and replace the O-ring,
12. Check the transfer oil seal for damage and fluidle8ks.
13, lf oil seal replacement is required. remove the trans-fer assembly, replace the oil seal, and adjust thetotal starting torque (see page 1+232 thtu ]'4-249||.
NOTE: Do not replace the oil seal with the transferassembly on the transmission.
COMPANION FLANGE
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