INFINITI QX56 2008 Factory Service Manual

TM-254
< DISASSEMBLY AND ASSEMBLY >
REPAIR FOR COMPONENT PARTS
2. Install snap ring in front sun gear using suitable tool.
3. Check operation of 3rd one-way clutch.
a. Hold oil pump assembly and turn front sun gear.
b. Check 3rd one-way clutch for correct locking and unlockingdirections.
CAUTION:
If not as shown, check installa tion direction of 3rd one-way
clutch.
Front Carrier, Input Clutc h, Rear Internal GearINFOID:0000000004917898
COMPONENTS
SCIA3110E
SCIA3131E
Revision: March 2010 2008 QX56

REPAIR FOR COMPONENT PARTSTM-255
< DISASSEMBLY AND ASSEMBLY >
CEF
G H
I
J
K L
M A
B
TM
N
O P
DISASSEMBLY
1. Seal ring 2. O-ring3. Needle bearing
4. Bearing race 5. Front carrier assembly6. Needle bearing
7. Snap ring 8. Snap ring9. Retaining plate
10. Driven plate 11. Input clutch drum12. Drive plate
13. Rear internal gear
SCIA5244E
Revision: March 2010 2008 QX56

TM-256
< DISASSEMBLY AND ASSEMBLY >
REPAIR FOR COMPONENT PARTS
1. Compress snap ring using suitable tool.
2. Remove front carrier assembly and input clutch assembly fromrear internal gear.
3. Remove front carrier assembly from input clutch assembly.
a. Remove bearing race from front carrier assembly.
b. Remove needle bearing from front carrier assembly.
c. Remove snap ring from front carrier assembly. CAUTION:
Do not expand snap ring excessively.
4. Disassemble input clutch assembly.
a. Remove O-ring and seal rings from input clutch assembly.
SCIA5661E
SCIA5232E
SCIA5233E
SCIA5234E
SCIA5235E
Revision: March 2010 2008 QX56

REPAIR FOR COMPONENT PARTSTM-257
< DISASSEMBLY AND ASSEMBLY >
CEF
G H
I
J
K L
M A
B
TM
N
O P
b. Remove needle bearing from input clutch assembly.
c. Remove snap ring from input clutch drum using suitable tool.
d. Remove drive plates, driven plates and retaining plate from input clutch drum.
INSPECTION
Front Carrier Snap Ring
• Check for deformation, fatigue or damage.CAUTION:
If necessary, replace the snap ring.
Input Clutch Snap Ring
• Check for deformation, fatigue or damage.CAUTION:
If necessary, replace the input clutch assembly.
Input Clutch Drum
• Check for deformation, fatigue or damage or burns.CAUTION:
If necessary, replace the input clutch assembly.
Input Clutch Drive Plates
• Check facing for burns, cracks or damage.CAUTION:
If necessary, replace the input clutch assembly.
Input Clutch Retaining Plate and Driven Plates
• Check facing for burns, cracks or damage.CAUTION:
If necessary, replace the input clutch assembly.
Front Carrier Assembly
• Check for deformation, fatigue or damage.
CAUTION:
If necessary, replace the front carrier assembly.
Rear Internal Gear
• Check for deformation, fatigue or damage.CAUTION:
If necessary, replace the rear internal gear.
ASSEMBLY
1. Install input clutch.
SCIA2853E
SCIA2864E
Revision: March 2010 2008 QX56

TM-258
< DISASSEMBLY AND ASSEMBLY >
REPAIR FOR COMPONENT PARTS
a. Install drive plates, driven plates and retaining plate in inputclutch drum.
CAUTION:
Take care with order of plates.
b. Install snap ring in input clutch drum using suitable tool.
c. Install needle bearing in input clutch assembly. CAUTION:
Apply petroleum jelly to needle bearing.
d. Install new O-ring and new seal ri ngs in input clutch assembly.
CAUTION:
• Do not reuse O-ring and seal rings.
• Apply ATF to O-ring.
• Apply petroleum jelly to seal rings.
SCIA5237E
SCIA2864E
SCIA2853E
SCIA5235E
Revision: March 2010 2008 QX56

REPAIR FOR COMPONENT PARTSTM-259
< DISASSEMBLY AND ASSEMBLY >
CEF
G H
I
J
K L
M A
B
TM
N
O P
2. Install front carrier assembly.
a. Install snap ring to front carrier assembly. CAUTION:
Do not expand snap ring excessively.
b. Install needle bearing in front carrier assembly. CAUTION:
• Take care with the direction of needle bearing. Refer to
TM-229, "
Location of Adjusting Shims, Needle Bearings,
Thrust Washers and Snap Rings".
• Apply petroleum jelly to needle bearing.
c. Install bearing race in front carrier assembly. CAUTION:
Apply petroleum jelly to bearing race.
d. Install front carrier assembly to input clutch assembly.
3. Compress snap ring using suitable tool.
4. Install front carrier assembly and input clutch assembly to rear internal gear.
Mid Sun Gear, Rear Sun Gear, High and Low Reverse Clutch HubINFOID:0000000004917899
COMPONENTS
SCIA5234E
SCIA5233E
SCIA5232E
SCIA5661E
Revision: March 2010 2008 QX56

TM-260
< DISASSEMBLY AND ASSEMBLY >
REPAIR FOR COMPONENT PARTS
DISASSEMBLY
1. Remove needle bearing and bearing races from high and lowreverse clutch hub.
2. Remove snap ring from mid sun gear assembly using suitable tool.
CAUTION:
Do not expand snap ring excessively.
1. Needle bearing 2. Bearing race 3. Snap ring
4. High and low reverse clutch hub 5. Needle bearing 6. Snap ring
7. 1st one-way clutch 8. Rear sun gear 9. Seal ring
10. Mid sun gear
SCIA5343E
SCIA5238E
SCIA2855E
Revision: March 2010 2008 QX56

REPAIR FOR COMPONENT PARTSTM-261
< DISASSEMBLY AND ASSEMBLY >
CEF
G H
I
J
K L
M A
B
TM
N
O P
3. Remove high and low reverse clutch hub from mid sun gear assembly.
a. Remove needle bearing from high and low reverse clutch hub.
4. Remove rear sun gear assembly from mid sun gear assembly.
a. Remove snap ring from rear sun gear using suitable tool.
SCIA2856E
SCIA2857E
SCIA2858E
SCIA2859E
Revision: March 2010 2008 QX56

TM-262
< DISASSEMBLY AND ASSEMBLY >
REPAIR FOR COMPONENT PARTS
b. Remove 1st one-way clutch from rear sun gear.
5. Remove seal rings from mid sun gear.
INSPECTION
High and Low Reverse Clutch Hub Snap Ring, Rear Sun Gear Snap Ring
• Check for deformation, fatigue or damage.CAUTION:
If necessary, replace the snap ring.
1st One-way Clutch
• Check frictional surface for wear or damage.CAUTION:
If necessary, replace the 1st one-way clutch.
Mid Sun Gear
• Check for deformation, fatigue or damage.CAUTION:
If necessary, replace the mid sun gear.
Rear Sun Gear
• Check for deformation, fatigue or damage.CAUTION:
If necessary, replace the rear sun gear.
High and Low Reverse Clutch Hub
• Check for deformation, fatigue or damage.CAUTION:
If necessary, replace the high and low reverse clutch hub.
ASSEMBLY
SCIA4633E
SCIA2861E
Revision: March 2010 2008 QX56

REPAIR FOR COMPONENT PARTSTM-263
< DISASSEMBLY AND ASSEMBLY >
CEF
G H
I
J
K L
M A
B
TM
N
O P
1. Install new seal rings to mid sun gear. CAUTION:
• Do not reuse seal rings.
• Apply petroleum jelly to seal rings.
2. Install 1st one-way clutch to rear sun gear. CAUTION:
Apply petroleum jelly to 1st one-way clutch.
3. Install snap ring to rear sun gear using suitable tool.
4. Install rear sun gear assembly to mid sun gear assembly.
5. Install needle bearing to high and low reverse clutch hub. CAUTION:
• Take care with the direction of needle bearing. Refer to
TM-229, "
Location of Adjusting Shims, Needle Bearings,
Thrust Washers and Snap Rings".
• Apply petroleum jelly to needle bearing.
SCIA2861E
SCIA4633E
SCIA2859E
SCIA2858E
SCIA2857E
Revision: March 2010 2008 QX56