1998 HONDA CR-V Oil

Description
Hydraulic Flow (cont'dl
Reverse Driving at Constant Speed l2WD)when driving in reverse at a constant speed, the dual pump system functions in two wheel drive mode.The rotation speed of the front and rear wheels is the same, so the speed of the front and rear pumps is also the same,Fluid discharged by the front oil pump is drawn in by the rear oil pump and is circulated through the system. But, becausethe there is a difference in the capacity between the two pumps, fluid flows through check valve E, and then through ori-Iices. This fluid lubricates and cools the clutch assembly and bearings.ls this condition, only a low pressure is built up at the clutch piston. Therefore the clutch does not engage, and the vehicleremains in 2WD (front wheel drive).
Reverse Deceleration l/tWDl
During reverse deceleration, the dual pump system can engage four wheel drive.When decelerating in reverse direction, the speed of the rear wheels may exceed the speed of the front wheels (due toengine braking). In this condition, the rear oil pump draws fluid through check valves B and C. Fluid discharged from therear oil pump then flows through check valve E to the clutch piston. There, pressure is regulated by two orifices.The regulated hydraulic pressure at the clutch piston may force the plates and discs of the clutch together to form a con,nection. The engaged clutch passes driving force from the transfer assembly to the rear wheels, producing 4WD.
oRtFtcEsREAR OIL PUMP
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Rear Differential AssemblY
Troubleshooting
Most problems in the unit are to be diagnosed by identifying noises from the gears or bear'ngs'
care should be taken during diagnosis not to confuse differential noises with those from other drivetra'n components'
SymptomProbable CauseRemedy
Will not go into 4WD mode. Fluid level too low
. Incorrect fluid type
. Add fluid. Replace
Will not return to 2WD modeIncorrect fluid typeDrain and fill the differential
Gear or bearing noisesFluid level too low
Incorrect fluid type
Damaged or chipped gears
Add fluid
Drain and fill the differential
Replace the differential carrier
assemory
Overheating. Fluid leveltoo low
. Incorrect fluid type
. Add fluid. Drain and fill the differential
Fluid leakFluid level too high
Clogged breather hose
Worn or damaged oil seal
Damaged sealing washer
Loose mounting bolts or inade-
quate sealing
Lower to proper level
Clean or replace
Replace
Replace
Recheck torque or aPPIY sealant
15-13
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Maintenance
Differential Fluid
!@ Make sure lifts are placed properly lseesection 1).
1. With the vehicle on level ground, inspect differential
fluid with engine OFF.
2. Remove the oil filler plug, then check the level andcondition of the fluid.
Proper Level
o|I FII.IIR PI-UG4t N.m la.8 kgl.m, 35 lbl.ftl
The fluid level must be up ro the fill hole. lf it isbelow the hole, add the recommended fluid until itruns out, then reinstall the oil filler plug with a new
wasner.
lf the differential tluid is dirty, remove the drainplug, and drain the fluid.
4.
DMIN PLUGa7 N.m 14.8 kgl.m, 35 lbt.ftl
15-14
Clean the drain plug, then reinstall it with a new
washer, and refill the differential with the recom-
mended fluid to the proper level.
NOTEr lf you disassembly the differential, check thefluid level again after the 4WD system check is fin-
ished. Add fluid if necessary.
Reinstall the oil filler plug with a new washer.
Fluid Capacity
1.0 / {1.1 US $, 0.9 lmp qt) at tluid change
1.2 / {1.3 US $, 1.1 lmp qt) at oyerhaul
Recommended fluid:
Genuine Honda CVT Fluid
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Rear Differential Assembly
lllustrated Index
O.RINGReplace.
6xl.0m12 N.m (1.2 kgf m,8.7 lbt'ftl
BACK-UP RING
COMPANION FLANGE
CLUTCH HUB/PLATES/DISCS
DIFFERENNAL CLUTCHASSEMBLY
DOWEL PINS
OIL PUMP DRIVESHAFT
LOCKNUT, 24 mmReplace.118 N.m (12.0 kgtm.87 rbt ft)
OIL SEALReplace.
PRESSURE PLATE
THBUST NEEDLEAEARING""t",at\(
'd'
CLUTCH GUIDE
OIL PUMPPIN
e
MAGNET
6x1.0mm12 N.m 11.2 kgt'm,8.7 lbf'ft|
OIL STRAINER
15-15
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7. Insert the edge of the screwdriver into the groove
located under the differential housing Pry out the
driveshaft inboard ioint with a screwdraver.
NOTE: Take care not to damage the differential oil
seal and differential ring when prying out the differ-
ential inboard joint.
8. Remove the mounting bolts and the washers.
DRIVESHAFT
MOUNTING BOLTS'10 x 1 .25 mm,19 N'm (5 0 kgf m, 36 lbtftl
Lower the rear differential assembly on the trans-
mission jack, then remove the rear driveshafts from
the rea r difterential assembly.
DIFFERENTIAL
12 x 1.25 fifi
10. Remove the rear difterential mounting bracket A
from the rear differential assembly.
N.m {7.0 lgf.m. 5l lbl.tt)
REAR DIFFERENTIALMOUNTING BRACKET A
REAN DFFERENTI,ALASSEMBLY
11.Install the rear differential assembly in the reverse
order of removal.
Note these items during reassembly
. lnstall the breather tube to the breather tube joint
properly.
. During the propeller shaft installation, align the
marks on the propeller shaft and companion
flange.
. Reiill the rear differential with the recommended
fluid to the proper level {see page 15-14).
15-17
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Differential Carrier Assembly
Leak Repair
'1. Remove the bolts in a crisscross oattern. thenremove the differential housing.
I x 1.25 mm22 N.m 12.2 kgl.m, 16 tbtftlDIFFERENTIAL HOUSING
2.Apply liquid gasket to the sealing surface of the dit-ferential housing, and note these items:. Use liquid gasket (P/N 08718 - 000'1).. Remove any dirt or fluid from the sealing sur-lace.
. lf 20 minutes have passed after applying liquidgasket, reapply it before you assemble the hous-
ings. Allow it to cure at least 30 minutes afterassembly before filling differential with ftuid.
DIFFERENTIALHOUSING
15-18
Install the differential housing. then torque the boltsin a crisscross pattern in several steps.
Install the oil seals (see page 15-19).
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Oil Seals
Replacement
1. Remove the oil seals from the differential housing.
Right side:
Left side:
2. Install the oil seals squarely using the special tools.
Be carelul not to damage the lip ol the oil seals.
Right side: Installation depth of the oil seal is 9 mm
(0.35 in) below the edge of the differential housing.
OIL SEAL
OIL SEAL
Left side: Install the oil seal flush with the edge of
the differential carrier assembly.
OIL SEAL
HUB DIS/ASSEMBLY TOOL07965 - 6920101
(cont'd)
15-19
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Oil SealsRear Differential Assembly
Replacement (cont'd)
3. Remove the oil seal from the toroue control differ-
ential case.
Install the oil seal squarely using the special tool.careful not to damage the lip of the oil seal.
15-20
BREATHER TUBE
DRAIT{ PLUG
Disassembly
1. Remove the breather tube, the drain plug and the oilfiller plug.
OIL FILI.IR PLUG
Raise the locknut tab from the groove of the clutchguide, making sure that the tab completelv clearsthe groove to prevent damaging the clutch guide.
L(rcKNUT, 24 mmReplace.
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