Infiniti QX4 (R50). Manual — part 82
SAT382I
3.
Remove low one-way clutch inner race, spring retainer and
return spring from transmission case.
4.
Remove seal rings from low one-way clutch inner race.
5.
Remove needle bearing from low one-way clutch inner race.
SAT876A
6.
Remove low and reverse brake piston using compressed air.
7.
Remove oil seal and D-ring from piston.
INSPECTION
NBAT0138
Low and Reverse Brake Snap Ring and Spring Retainer
NBAT0138S01
I
Check for deformation, or damage.
SAT829A
Low and Reverse Brake Return Springs
NBAT0138S02
I
Check for deformation or damage. Also measure free length
and outside diameter.
Inspection standard:
Refer to SDS, AT-357.
SAT845A
Low and Reverse Brake Drive Plates
NBAT0138S03
I
Check facing for burns, cracks or damage.
I
Measure thickness of facing.
Thickness of drive plate:
Standard value
Model 4EX16 (2WD)
1.90 - 2.05 mm (0.075 - 0.081 in)
Model 4EX17, 4EX23 (4WD)
1.52 - 1.67 mm (0.0598 - 0.0657 in)
Wear limit
GI
MA
EM
LC
EC
FE
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
REPAIR FOR COMPONENT PARTS
Low & Reverse Brake (Cont’d)
AT-325
1.40 mm (0.0551 in)
I
If not within wear limit, replace.
SAT877A
Low One-way Clutch Inner Race
NBAT0138S04
I
Check frictional surface of inner race for wear or damage.
SAT878A
I
Install a new seal rings onto low one-way clutch inner race.
I
Be careful not to expand seal ring gap excessively.
I
Measure seal ring-to-groove clearance.
Inspection standard:
Standard value: 0.10 - 0.25 mm (0.0039 - 0.0098 in)
Allowable limit: 0.25 mm (0.0098 in)
I
If not within allowable limit, replace low one-way clutch inner
race.
SAT112B
ASSEMBLY
NBAT0139
1.
Install needle bearing onto one-way clutch inner race.
I
Pay attention to its direction — Black surface goes to rear
side.
I
Apply petroleum jelly to needle bearing.
SAT879A
2.
Install oil seal and D-ring onto piston.
I
Apply ATF to oil seal and D-ring.
REPAIR FOR COMPONENT PARTS
Low & Reverse Brake (Cont’d)
AT-326
SAT880A
3.
Install piston by rotating it slowly and evenly.
I
Apply ATF to inner surface of transmission case.
SAT881A
4.
Install return springs, spring retainer and low one-way clutch
inner race onto transmission case.
5.
Install dish plate, low and reverse brake drive plates, driven
plates and retaining plate.
6.
Install snap ring on transmission case.
SAT872A
7.
Check operation of low and reverse brake clutch piston. Refer
to “DISASSEMBLY”, AT-324.
SAT885A
8.
Measure clearance between retaining plate and snap ring.
If not within allowable limit, select proper retaining plate.
Specified clearance:
Standard
0.8 - 1.1 mm (0.031 - 0.043 in)
Allowable limit
2.7 mm (0.106 in)
Retaining plate:
Refer to SDS, AT-360.
SAT884A
9.
Install low one-way clutch inner race seal ring.
I
Apply petroleum jelly to seal ring.
I
Make sure seal rings are pressed firmly into place and
held by petroleum jelly.
GI
MA
EM
LC
EC
FE
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
REPAIR FOR COMPONENT PARTS
Low & Reverse Brake (Cont’d)
AT-327
Forward Clutch Drum Assembly
COMPONENTS
NBAT0140
SAT211GA
SAT212G
DISASSEMBLY
NBAT0141
1.
Remove snap ring from forward clutch drum.
2.
Remove side plate from forward clutch drum.
SAT213G
3.
Remove low one-way clutch from forward clutch drum.
4.
Remove snap ring from forward clutch drum.
SAT891A
5.
Remove needle bearing from forward clutch drum.
REPAIR FOR COMPONENT PARTS
Forward Clutch Drum Assembly
AT-328
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