IDX INFINITI QX4 2001 Factory Service Manual

SAT860A
DISASSEMBLY AND ASSEMBLYNBAT0135Forward and overrun clutches are serviced essentially the same
way as reverse clutch is serviced. However, note the following
exceptions.
ICheck of forward clutch operation
SAT861A
ICheck of overrun clutch operation
SAT865A
IRemoval of forward clutch drum
Remove forward clutch drum from transmission case by hold-
ing snap ring.
SAT862A
IRemoval of forward clutch and overrun clutch pistons
a) While holding overrun clutch piston, gradually apply com-
pressed air to oil hole.
SAT863A
b) Remove overrun clutch from forward clutch.
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REPAIR FOR COMPONENT PARTS
Forward and Overrun Clutches (Cont'd)
AT-321

SAT867A
IAlign notch in forward clutch piston with groove in for-
ward clutch drum.
SAT868A
b) Install overrun clutch by turning it slowly and evenly.
IApply ATF to inner surface of forward clutch piston.
SAT869A
IMeasurement of clearance between retaining plate and snap
ring of overrun clutch
Specified clearance:
Standard
1.0 - 1.4 mm (0.039 - 0.055 in)
Allowable limit
2.0 mm (0.079 in)
Retaining plate:
Refer to SDS, AT-359.
SAT870A
IMeasurement of clearance between retaining plate and snap
ring of forward clutch
Specified clearance:
Standard
0.35 - 0.75 mm (0.0138 - 0.0295 in)
Allowable limit
Model 4EX16 (2WD)
2.15 mm (0.0846 in)
Model 4EX17, 4EX23 (4WD)
2.35 mm (0.0925 in)
Retaining plate:
Refer to SDS, AT-359.
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REPAIR FOR COMPONENT PARTS
Forward and Overrun Clutches (Cont'd)
AT-323

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.
INSPECTIONNBAT0138Low and Reverse Brake Snap Ring and Spring RetainerNBAT0138S01ICheck for deformation, or damage.
SAT829A
Low and Reverse Brake Return SpringsNBAT0138S02ICheck for deformation or damage. Also measure free length
and outside diameter.
Inspection standard:
Refer to SDS, AT-357.
SAT845A
Low and Reverse Brake Drive PlatesNBAT0138S03ICheck facing for burns, cracks or damage.
IMeasure 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
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REPAIR FOR COMPONENT PARTS
Low & Reverse Brake (Cont'd)
AT-325

SAT880A
3. Install piston by rotating it slowly and evenly.
IApply 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 ªDISASSEMBLYº, 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.
IApply petroleum jelly to seal ring.
IMake sure seal rings are pressed firmly into place and
held by petroleum jelly.
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REPAIR FOR COMPONENT PARTS
Low & Reverse Brake (Cont'd)
AT-327

SAT892A
INSPECTIONNBAT0142Forward Clutch DrumNBAT0142S01ICheck spline portion for wear or damage.
ICheck frictional surfaces of low one-way clutch and needle
bearing for wear or damage.
SAT893A
Needle Bearing and Low One-way ClutchNBAT0142S02ICheck frictional surface for wear or damage.
SAT214G
ASSEMBLYNBAT01431. Install needle bearing in forward clutch drum.
2. Install snap ring onto forward clutch drum.
SAT894A
3. Install low one-way clutch onto forward clutch drum by push-
ing the roller in evenly.
SAT895A
IInstall low one-way clutch with flange facing rearward.
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REPAIR FOR COMPONENT PARTS
Forward Clutch Drum Assembly (Cont'd)
AT-329

SAT899A
3. Remove snap ring from forward clutch hub.
SAT900A
4. Remove end bearing.
SAT955A
5. Remove forward one-way clutch and end bearing as a unit
from forward clutch hub.
SAT901A
6. Remove snap ring from forward clutch hub.
SAT902A
INSPECTIONNBAT0146Rear Internal Gear and Forward Clutch HubNBAT0146S01ICheck gear for excessive wear, chips or cracks.
ICheck frictional surfaces of forward one-way clutch and thrust
washer for wear or damage.
ICheck spline for wear or damage.
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REPAIR FOR COMPONENT PARTS
Rear Internal Gear and Forward Clutch Hub (Cont'd)
AT-331

SAT905A
8. After installing, check to assure that forward clutch hub rotates
clockwise.
Band Servo Piston Assembly
COMPONENTSNBAT0148
SAT161K
SAT909A
DISASSEMBLYNBAT01491. Block one oil hole in OD servo piston retainer and the center
hole in OD band servo piston.
2. Apply compressed air to the other oil hole in piston retainer to
remove OD band servo piston from retainer.
3. Remove D-ring from OD band servo piston.
SAT910A
4. Remove band servo piston assembly from servo piston
retainer by pushing it forward.
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REPAIR FOR COMPONENT PARTS
Rear Internal Gear and Forward Clutch Hub (Cont'd)
AT-333

SAT162K
Return SpringsNBAT0150S02ICheck for deformation or damage. Measure free length and
outer diameter.
Inspection standard:
Refer to SDS, AT-357.
SAT917A
ASSEMBLYNBAT01511. Install O-rings onto servo piston retainer.
IApply ATF to O-rings.
IPay attention to position of each O-ring.
SAT918A
2. Install servo cushion spring retainer onto band servo piston.
SAT919A
3. Install E-ring onto servo cushion spring retainer.
SAT920A
4. Install D-rings onto band servo piston.
IApply ATF to D-rings.
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REPAIR FOR COMPONENT PARTS
Band Servo Piston Assembly (Cont'd)
AT-335

Parking Pawl Components
COMPONENTSNBAT0152
SAT558J
SAT226H
DISASSEMBLYNBAT01531. Slide return spring to the front of adapter case flange.
2. Remove return spring, parking pawl spacer and parking pawl
from adapter case.
3. Remove parking pawl shaft from adapter case.
SAT228H
4. Remove parking actuator support from adapter case.
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REPAIR FOR COMPONENT PARTS
Parking Pawl Components
AT-337

SAT931A
Assembly (1)NBAT01551. Install manual shaft components.
a. Install oil seal onto manual shaft.
IApply ATF to oil seal.
IWrap threads of manual shaft with masking tape.
b. Insert manual shaft and oil seal as a unit into transmission
case.
c. Remove masking tape.
SAT932A
d. Push oil seal evenly and install it onto transmission case.
SAT933A
e. Align groove in shaft with retaining pin hole, then retaining pin
into position as shown in figure at left.
SAT901E
f. Install detent spring and spacer.
g. While pushing detent spring down, install manual plate onto
manual shaft.
SAT936A
h. Install lock nuts onto manual shaft.
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ASSEMBLY
Assembly (1)
AT-339