Center Case

WARNING: This page is about a different car, the 2013 Nissan Armada. However, it is still accessible from the selected car via links, so may be relevant.

Apply ATF to the new O-ring, and install it on the oil filter stud.
CAUTION: Do not reuse O-ring.
Install the oil filter stud to the oil filter.

Fig 1: Identifying Oil Filter And Stud, O-Ring
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Apply ATF to the two new O-rings (1), and install them on the oil filter (2).
CAUTION: Do not reuse O-rings.

Fig 2: Identifying Oil Filter And O-Rings
Courtesy of NISSAN NORTH AMERICA, INC.
Install the oil filter to the center case. Tighten the bolts (<==) to the specified torque. Refer to "REMOVAL AND INSTALLATION ".
CAUTION:
- Do not damage oil filter.
- Attach oil filter and tighten bolts evenly.
Fig 3: Locating Oil Filter Mounting Bolts
Courtesy of NISSAN NORTH AMERICA, INC.
Install the outer gear and inner gear into the sub oil pump housing, and measure the side clearance. Refer to "DISASSEMBLY AND ASSEMBLY ".

Fig 4: Identifying Sub Oil Pump Cover, Inner And Outer Gear And Housing
Courtesy of NISSAN NORTH AMERICA, INC.
Align the dowel pin hole and bolt hole of the sub oil pump assembly with the center case. Install the sub oil pump cover. Then tighten to the specified torque. Refer to "DISASSEMBLY AND ASSEMBLY "

Fig 5: Aligning Dowel Pin Hole And Bolt Hole Of Sub Oil Pump Assembly With Center Case
Courtesy of NISSAN NORTH AMERICA, INC.
Apply ATF to the new O-ring and install it to the transfer motor.
CAUTION: Do not reuse O-ring.
Fit the double-flat end of the transfer motor shaft into the slot of the sub-oil pump assembly. Then tighten to the specified torque. Refer to "DISASSEMBLY AND ASSEMBLY "
CAUTION: Be sure to install connector bracket.

Fig 6: Identifying ATF Applying Area On Transfer Motor
Courtesy of NISSAN NORTH AMERICA, INC.
Apply ATF to the new lip seals, and install them to the center case.
CAUTION:
- Do not reuse lip seals.
- There are 2 kinds of lip seals (lip seal of large inner diameter: 5 pieces, lip seal of small inner diameter: 2 pieces). Confirm their position for installation.
Fig 7: Locating Center Case Lip Seals
Courtesy of NISSAN NORTH AMERICA, INC.
Install the control valve assembly to the center case, and tighten to the specified torque. Refer to "DISASSEMBLY AND ASSEMBLY ".
CAUTION:
- Do not reuse any part that has been dropped or damaged.
- Make sure valve is assembled in the proper direction.
- Do not use a magnet because residual magnetism stays during assembly.
Fig 8: Locating Control Valve Assembly Bolts
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Install the transfer terminal cord assembly into the center case, and secure with a snap ring.

Fig 9: Identifying Control Valve Assembly Snap Ring
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Apply ATF to the new O-rings, and install them on the oil strainer.
CAUTION: Do not reuse O-rings.
Install the oil strainer to the control valve assembly.

Fig 10: Identifying Oil Strainer O-Rings
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Tighten the bolts (<==) to the specified torque. Refer to "DISASSEMBLY AND ASSEMBLY ".

Fig 11: Locating Oil Strainer Mounting Bolts
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Apply ATF to the new D-rings, and install them to the clutch piston.
CAUTION: Do not reuse D-rings.

Fig 12: Identifying Clutch Piston And D-Rings
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Install the thrust needle bearing race to the clutch piston.

Fig 13: Installing Thrust Needle Bearing Race To Clutch Piston
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Install the clutch piston to the center case as shown below.
CAUTION: Install so the fitting protrusion of clutch piston aligns with the dent of center case.

Fig 14: Installing Clutch Piston To Center Case
Courtesy of NISSAN NORTH AMERICA, INC.
Remove all the sealant from the oil pressure check port and inside the center case.
CAUTION: Remove old sealant adhering to mating surfaces. Also remove any moisture, oil, or foreign material adhering to application and mating surfaces.
Thread the new oil pressure check plug in 1 or 2 pitches and apply sealant to the oil pressure check plug threads. Tighten to the specified torque. Refer to "DISASSEMBLY AND ASSEMBLY ".
- Use Genuine Silicone RTV or equivalent. Refer to "RECOMMENDED CHEMICAL PRODUCTS AND SEALANTS ".
  
  Fig 15: Removing Sealant From Oil Pressure Check Port And Inside Center Case
  Courtesy of NISSAN NORTH AMERICA, INC.
  
  CAUTION: Do not reuse oil pressure check plug.
Install the new snap ring to the clutch hub using suitable tool.
CAUTION: Do not reuse snap ring.

Fig 16: Installing Snap Ring To Clutch Hub Using Suitable Tool
Courtesy of NISSAN NORTH AMERICA, INC.
Apply petroleum jelly to the needle bearing, and install the needle bearing, spacer, clutch drum and clutch hub to the mainshaft.

Fig 17: Identifying Main Shaft And Related Components
Courtesy of NISSAN NORTH AMERICA, INC.
Install the new snap ring to the mainshaft.
CAUTION: Do not reuse snap rings.

Fig 18: Installing Snap Ring To Mainshaft
Courtesy of NISSAN NORTH AMERICA, INC.
Apply ATF each plate, then install them into the clutch drum as shown below.

Fig 19: Identifying Clutch Drum And Related Components
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Install the return spring assembly into the clutch hub.

Fig 20: Installing Return Spring Assembly Into Clutch Hub
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Install the press flange by aligning the notches to the clutch hub as shown below.

Fig 21: Locating Notches On Clutch Hub
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Press the press flange to install the new snap ring into snap ring groove on mainshaft using Tools.
Tool number (A): ST22452000 (J-34335)

(B): ST30911000 (-)

(C): KV31103300 (-)

CAUTION: Do not reuse snap ring.

Fig 22: Pressing Press Flange Using Tool
Courtesy of NISSAN NORTH AMERICA, INC.
Install the new snap ring to the mainshaft using suitable tool.
CAUTION: Do not reuse snap ring.

Fig 23: Removing/Installing Mainshaft Snap Ring Using Suitable Tool
Courtesy of NISSAN NORTH AMERICA, INC.
Apply ATF to the thrust needle bearing and install it on the press flange.

Fig 24: Installing Thrust Needle Bearing On Press Flange
Courtesy of NISSAN NORTH AMERICA, INC.
Install the new snap ring to the main shaft.
CAUTION: Do not reuse snap ring.

Fig 25: Identifying Mainshaft Snap Ring
Courtesy of NISSAN NORTH AMERICA, INC.
Install the mainshaft rear bearing to the center case using Tool.
Tool number: ST15310000 (J-25640-B)

Fig 26: Installing Mainshaft Rear Bearing To Center Case Using Tool
Courtesy of NISSAN NORTH AMERICA, INC.
Install the mainshaft assembly using a press.
- Press the mainshaft into the center case using Tools.
  Tool number (A): ST30911000 (-)
  
  (B): ST33052000 (-)
  
  Fig 27: Pressing Mainshaft Into Center Case Using Tools
  Courtesy of NISSAN NORTH AMERICA, INC.
Install the C-rings to the mainshaft.

Fig 28: Identifying Mainshaft C-Rings
Courtesy of NISSAN NORTH AMERICA, INC.
Set the washer holder on the mainshaft, and secure it with a new snap ring.
CAUTION: Do not reuse snap ring.

Fig 29: Securing Mainshaft Washer Holder Using Snap Ring
Courtesy of NISSAN NORTH AMERICA, INC.
Apply petroleum jelly to the stem bleeder and install it to the center case.

Fig 30: Installing Stem Bleeder To Center Case
Courtesy of NISSAN NORTH AMERICA, INC.
Apply ATF to the new seal ring and install it to the main oil pump cover.
CAUTION: Do not reuse seal ring.

Fig 31: Identifying Main Oil Pump Cover Seal Ring
Courtesy of NISSAN NORTH AMERICA, INC.
Install the inner gear and outer gear in the main oil pump housing. Then, measure the side clearance. Refer to "INSPECTION AND ADJUSTMENT ".

Fig 32: Measuring Inner And Outer Gear Side Clearance
Courtesy of NISSAN NORTH AMERICA, INC.
Install the main oil pump housing, outer gear and inner gear to the center case.

Fig 33: Identifying Main Oil Pump Housing, Outer And Inner Gear
Courtesy of NISSAN NORTH AMERICA, INC.
Install the main oil pump cover to the center case, and tighten to the specified torque. Refer to "DISASSEMBLY AND ASSEMBLY ".

Fig 34: Locating Main Oil Pump Cover To Center Case Mounting Bolts
Courtesy of NISSAN NORTH AMERICA, INC.
Remove all the sealant from the switch location area and inside the center case.
CAUTION: Remove old sealant adhering to mounting surfaces. Also remove any moisture, oil, or foreign material adhering to application and mounting surfaces.
Thread the ATP switch and neutral-4LO switch in one to two pitches and apply sealant to the threads of the switches. Tighten to the specified torque. Refer to "DISASSEMBLY AND ASSEMBLY ".

Fig 35: Identifying Sealant Applying Area On ATP Switch And Neutral-4LO Switch
Courtesy of NISSAN NORTH AMERICA, INC.
- Use Genuine Silicone RTV or equivalent. Refer to "RECOMMENDED CHEMICAL PRODUCTS AND SEALANTS ".
  NOTE:
  - Neutral-4LO switch harness connector is gray.
  - ATP switch harness connector is black.
Install the front drive shaft rear bearing using Tools.
Tool number (A): KV40100621 (J-25273)

(B): ST30032000 (J-26010-01)

Fig 36: Installing Front Drive Shaft Rear Bearing Using Tools
Courtesy of NISSAN NORTH AMERICA, INC.
Install the front drive shaft to the front bearing using Tools.
Tool number (A): KV40100621 (J-25273)

(B): ST30032000 (J-26010-01)

Fig 37: Installing Front Drive Shaft To Bearing Using Tools
Courtesy of NISSAN NORTH AMERICA, INC.
Install the drive chain to the front drive shaft and clutch drum.
CAUTION: Install drive chain by aligning identification marks to the rear as shown below.

Fig 38: Identifying Identification Mark On Drive Chain
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Tap the front drive shaft while keeping it upright and press-fit the front drive shaft rear bearing.
CAUTION: Do not tap drive chain.
Install the front case assembly. Refer to "DISASSEMBLY AND ASSEMBLY ".
Install the rear case assembly. Refer to "DISASSEMBLY AND ASSEMBLY ".

Fig 39: Tapping Front Drive Shaft
Courtesy of NISSAN NORTH AMERICA, INC.