Infiniti Car 1998-05

Transmission Removal & Installation

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  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Remove or disconnect the following:

    Negative battery cable
     
    Engine cover
     
    Positive battery cable and battery
     
    Exhaust pipe
     
    Propeller shaft
     
    Automatic Transmission (A/T) control rod and solenoid valve harness connector
     
    Crankshaft Position (CKP) sensor from the transmission
     
    Oil cooler and transmission fluid pipes, then plug the lines
     
    Air breather hose
     
    Starter motor
     
    Dust cover from converter housing
     

  4.  


NOTE
When turning the crankshaft, turn it clockwise as viewed from the front of the engine.

  1. Turn the crankshaft, then remove the 4 tightening bolts for the drive plate and torque converter.
  2.  
  3. Support the transmission assembly with a suitable jack. Be careful not the let the jack hit the drain plug.
  4.  
  5. Remove or disconnect the following:

    Rear member
     
    Engine-to-transmission bolts
     

  6.  


WARNING
Before removal, secure the transmission to the jack and secure the torque converter to prevent it from falling.



Transmission from the vehicle by carefully lowering it with the jack
 



Click image to see an enlarged view

Fig. Exploded view of the automatic transmission mounting-G35 models

To install:

  1. Installation is the reverse of the removal procedure, noting the following:
    1. Tighten the transmission-to-engine bolts as shown in the illustration.
    2.  


      Click image to see an enlarged view

      Fig. Automatic transmission-to-engine bolt tightening specifications-G35 models

    3. Align the positions of the tightening bolts for the drive plate with those of the torque converter and hand-tighten. Then, tighten to 33-42 ft. lbs. (44-58 Nm).
    4.  
    5. After the converter is installed, rotate the crankshaft a few times to be sure the transmission rotates without any binding
    6.  
    7. Fill the transmission with fluid.
    8.  
    9. Start the vehicle, check for leaks and repair if necessary.
    10.  

  2.  

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Remove or disconnect the following:

    Negative battery cable
     
    Crankshaft Position (CKP) sensor
     
    Rear Heated Oxygen Sensor (HO2S) connector
     
    Exhaust tubes
     
    Fluid charging pipe
     
    Oil cooler lines. Plug fluid charging and oil cooler fittings after removing the lines.
     
    Control linkage from the selector lever
     
    Neutral safety switch and solenoid harness connectors
     
    Speed sensor connection
     
    Driveshaft (make matchmarks to ease in installation). Insert plug into rear seal opening to prevent loss of fluid.
     

  4.  
  5. Support the transmission safely.

    Bolts securing the torque converter to the flexplate
     
    Gussets securing the transmission to the engine
     
    Bolts attaching the transmission to the engine
     

  6.  


NOTE
The bolts securing the transmission to the engine are of different lengths. Note the length of the bolts as they are removed.

  1. Support the engine safely. Avoid jacking directly under the oil pan drain plug.
  2.  
  3. Remove the transmission from the vehicle.
  4.  

To install:

  1. Install or connect the following:

    Transmission in the vehicle and install the torque converter-to-flexplate bolts. Torque the bolts to 33-43 ft. lbs. (44-59 Nm).
     

  2.  
  3. Secure the transmission to the engine. Torque the bolts as follows:
    1. 70mm bolts: 80-87 ft. lbs. (108-118 Nm).
    2.  
    3. 90mm bolts: 51-58 ft. lbs. (69-78 Nm).
    4.  



    Torque converter-to-drive plate bolts and tighten in 2 steps to 33-43 ft. lbs. (44-59 Nm)
     
    Driveshaft, aligning the matchmarks made before removal
     
    Speed sensor connection
     
    Neutral safety switch and solenoid harness connectors
     
    Control linkage to the selector lever
     
    Fluid charging and oil cooler lines
     
    Exhaust tubes
     

  4.  
  5. Lower the vehicle.
  6.  
  7. Fill the transmission with fluid.
  8.  
  9. Connect negative battery cable.
  10.  
  11. Start the vehicle, check for leaks and repair if necessary.
  12.  

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Remove or disconnect the following:

    Negative battery cable
     
    Engine splash shield
     
    Front exhaust tube and center muffler
     
    Driveshaft (make matchmarks to ease in installation). Insert plug into rear seal opening to prevent loss of fluid.
     
    Transmission control rod
     
    Transmission harness connectors
     
    Crankshaft Position (CKP) sensor
     
    Oil cooler lines
     
    Breather hose
     
    Starter
     
    Torque converter cover
     
    Torque converter bolts
     

  4.  
  5. Place a transmission jack under the transmission
  6.  
  7. Remove or disconnect the following:

    Rear engine crossmember
     
    Transmission-to-engine bolts
     
    Transmission
     

  8.  

To install:

  1. Installation is the reverse of the removal procedure, noting the following:
    1. When installing the transmission, noting the correct bolt locations. The 65 mm bolts are the four bolts at the bottom. Tighten the 65 mm bolts to 55 ft. lbs. (74 Nm) and the 70 mm bolts to 84 ft. lbs. (114 Nm).
    2.  
    3. Tighten the torque converter-to-drive plate bolts in 2 steps to 38 ft. lbs. (51 Nm)
    4.  
    5. Lower the vehicle.
    6.  
    7. Fill the transmission with fluid.
    8.  
    9. Connect negative battery cable.
    10.  
    11. Start the vehicle, check for leaks and repair if necessary.
    12.  

  2.  

  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2.  
  3. Drain the transaxle fluid.
  4.  
  5. Remove or disconnect the following:

    Battery and bracket
     
    Air duct assembly
     
    Transaxle solenoid harness connector, Park Neutral Position (PNP) switch connector and revolution switch connector
     
    Crankshaft Position (CKP) sensor from the transaxle
     
    Control cable and transaxle coolant lines
     
    Halfshafts, the intake manifold support bracket and the starter
     
    Upper bolts attaching transaxle to the engine
     

  6.  
  7. Support the engine with a suitable stand and use a suitable jack to support the transaxle.
    NOTE
    Bolts are of different lengths, note the locations that the bolts are removed from.



    Center member
     
    Rear cover plate and the bolts securing the torque converter to the driveplate. Rotate the crankshaft to gain access to the bolts
     
    Transaxle mounts
     
    Lower transaxle mounting bolts and lower the transaxle
     

  8.  

To install:

  1. Place a straightedge across the bell housing of the transaxle and measure the distance to the mounting bosses on the torque converter. The distance should be 0.626 in. (16mm). If not, the torque converter is not installed correctly.
  2.  
  3. Check the driveplate run-out with a dial indicator. Maximum allowable run-out is 0.008 in. (0.2mm).
  4.  
  5. Raise the transaxle into position and install the transaxle mounting bolts. Tighten the 50, 55, and 65mm long bolts to 51-59 ft. lbs. (70-79 Nm). Torque the 35 and 45 mm long bolts to 12-15 ft. lbs. (16-21 Nm).
  6.  
  7. Install or connect the following:

    Torque converter bolts. Torque the bolts to 33-43 ft. lbs. (44-59 Nm). Rotate the crankshaft to gain access to the bolts
     
    Rear cover and center member
     
    Transaxle mounts
     
    Halfshafts, intake manifold support bracket and the starter
     
    Control cable and transaxle coolant lines
     
    CKP sensor to the transaxle
     
    Transaxle solenoid harness connector, PNP switch connector and revolution switch connector
     
    Air duct assembly
     
    Battery and bracket
     

  8.  
  9. Fill the transaxle with fluid.
  10.  
  11. Start the vehicle, check for leaks and repair if necessary.
  12.  


NOTE
The radio may contain a coded theft protection circuit. Always obtain the code number from the customer before disconnecting the battery.

  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2.  
  3. Drain the transaxle fluid.
  4.  
  5. Remove or disconnect the following:

    Battery and bracket
     
    Air cleaner and resonator
     
    Terminal cord assembly harness connector and Park Neutral Position (PNP) switch harness connector
     
    Revolution and Vehicle Speed Sensor (VSS) electrical connections
     
    Crankshaft Position (CKP) sensor from the transaxle
     
    Left-hand mounting bracket from transaxle and body
     
    Control cable from the transaxle
     
    Driveshafts
     
    Oil cooler pipes and cap pipes to avoid contamination
     
    Starter motor and place a jack under the oil pan to support the engine. Do not place the jack under the oil pan drain plug
     
    Crossmember
     
    Rear cover plate and bolts attaching the torque converter to the drive plate
     

  6.  
  7. Support the transaxle with a jack.
  8.  
  9. Remove the transaxle-to-engine bolts and lower the transaxle using the jack.
  10.  

To install:

  1. Install or connect the following:

    Torque converter in the transmission. Be sure the torque converter is fully seated in the front pump assembly. The distance from the front edge of the transmission to the bolt hole of the torque converter should be 0.75 in. (19mm)
     
    Position the transmission to the engine and install a few bolts to hold the transmission in place. Do not fully tighten the bolts at this time
     
    Torque converter-to-flexplate bolts. Torque the bolts to 33-43 ft. lbs. (44-59 Nm)
     

  2.  
  3. Secure the transmission to the engine. Torque the bolts in the sequence illustrated

    Click image to see an enlarged view

    Fig. Transaxle bolts tightening sequence and torque specifications-1998-02 I30 models with automatic transaxle

  4.  
  5. install all remaining components in the reverse order of removal.
  6.  
  7. Fill the transmission with new fluid. Use the same amount of fluid that was drained before removal.
  8.  
  9. Connect negative battery cable and start the engine. Allow the engine to reach normal operating temperature and check the transmission fluid level. Add fluid as needed.
  10.  

  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2.  
  3. Remove or disconnect the following:

    Negative battery cable
     
    Crankshaft Position (CKP) sensor
     
    Rear Heated O 2 S sensor connector
     
    Exhaust tubes
     
    Fluid charging pipe
     
    Oil cooler lines. Plug fluid charging and oil cooler fittings after removing lines.
     
    Control linkage from the selector lever
     
    Neutral safety switch and solenoid harness connectors
     
    Speed sensor connection
     
    Driveshaft (make matchmarks to ease in installation). Insert plug into rear seal opening to prevent loss of fluid.
     

  4.  
  5. Support the transmission safely.
    NOTE
    The bolts securing the transmission to the engine are of different lengths. Note the length of the bolts as they are removed.



    Bolts securing the torque converter to the flexplate
     
    Gussets securing the transmission to the engine
     
    Bolts attaching the transmission to the engine
     

  6.  
  7. Support the engine safely. Avoid jacking directly under the oil pan drain plug.
  8.  
  9. Remove the transmission from the vehicle.
  10.  

To install:

  1. Install or connect the following:

    Transmission in the vehicle and install the torque converter-to-flexplate bolts. Torque the bolts to 33-43 ft. lbs. (44-59 Nm)
     

  2.  
  3. Secure the transmission to the engine. Torque the bolts as follows:
    1. 70mm bolts: 80-87 ft. lbs. (108-118 Nm).
    2.  
    3. 90mm bolts: 51-58 ft. lbs. (69-78 Nm).
    4.  

  4.  
  5. Install the torque converter-to-drive plate bolts and torque in 2 steps to 33-43 ft. lbs. (44-59 Nm).

    Driveshaft, aligning the matchmarks made before removal
     

  6.  
  7. Install or connect the following:

    Speed sensor connection
     
    Neutral safety switch and solenoid harness connectors
     
    Control linkage to the selector lever
     
    Fluid charging and oil cooler lines
     
    Exhaust tubes
     

  8.  
  9. Lower the vehicle.
  10.  
  11. Connect negative battery cable.
  12.  
  13. Start the vehicle, check for leaks and repair if necessary.
  14.  

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Remove or disconnect the following:
    NOTE
    When turning the crankshaft, turn it clockwise as viewed from the front of the engine.



    Negative battery cable
     
    Engine cover
     
    Positive battery cable and battery
     
    Exhaust pipe
     
    Rear driveshaft
     
    Front driveshaft (AWD)
     
    Automatic Transmission (A/T) control rod and solenoid valve harness connector
     
    Crankshaft Position (CKP) sensor from the transmission
     
    Oil cooler and transmission fluid pipes, then plug the lines
     
    Air breather hose
     
    Starter motor
     
    Dust cover from converter housing
     

  4.  
  5. Turn the crankshaft, then remove the 4 tightening bolts for the drive plate and torque converter.
  6.  
  7. Remove the dynamic damper (AWD).

    Click image to see an enlarged view

    Fig. Dynamic damper assembly (AWD)

  8.  
  9. Support the transmission/transfer (AWD) assembly with a suitable jack. Be careful not the let the jack hit the drain plug.
  10.  
  11. Remove or disconnect the following:
    WARNING
    Before removal, secure the transmission to the jack and secure the torque converter to prevent it from falling.



    Rear member
     
    Engine-to-transmission bolts
     



    Transmission from the vehicle by carefully lowering it with the jack
     

  12.  
  13. Remove transfer assembly mounting bolts and separate transfer assembly from transmission (AWD; Refer to Transfer Case Assembly procedures).

    Click image to see an enlarged view

    Fig. Exploded view of the automatic transmission mounting-G35 2WD



    Click image to see an enlarged view

    Fig. Exploded view of the automatic transmission mounting-G35 AWD

  14.  

To install:

  1. Installation is the reverse of the removal procedure, noting the following:
    1. Tighten the transmission-to-engine bolts as shown in the illustration.

      Click image to see an enlarged view

      Fig. Automatic transmission-to-engine bolt tightening specifications-G35 2WD



      Click image to see an enlarged view

      Fig. Automatic transmission-to-engine bolt tightening specifications-G35 AWD

    2.  
    3. Align the positions of the tightening bolts for the drive plate with those of the torque converter and hand-tighten. Then, tighten to 33-42 ft. lbs. (44-58 Nm).
    4.  
    5. After the converter is installed, rotate the crankshaft a few times to be sure the transmission rotates without any binding
    6.  
    7. Fill the transmission with fluid.
    8.  
    9. Start the vehicle, check for leaks and repair if necessary.
    10.  

  2.  

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Remove or disconnect the following:

    Negative battery cable
     
    Engine splash shield
     
    Front cross bar (if equipped)
     
    Front exhaust tube and center muffler
     
    Driveshaft (make matchmarks to ease in installation). Insert plug into rear seal opening to prevent loss of fluid.
     
    Transmission control rod
     
    Transmission harness connectors
     
    Crankshaft Position (CKP) sensor
     
    Oil cooler lines
     
    Breather hose
     
    Starter
     
    Torque converter cover
     
    Torque converter bolts
     

  4.  
  5. Place a transmission jack under the transmission
  6.  
  7. Remove or disconnect the following:

    Rear engine crossmember
     
    Transmission-to-engine bolts
     
    Transmission

    Click image to see an enlarged view

    Fig. Exploded view of the automatic transmission mounting-Q45 and 2004 M45 models

     

  8.  

To install:

  1. Installation is the reverse of the removal procedure, noting the following:
    1. When installing the transmission, note the correct bolt locations. The 65 mm bolts are the four bolts at the bottom. Tighten the 65 mm bolts to 55 ft. lbs. (74 Nm) and the 70 mm bolts to 84 ft. lbs. (114 Nm).
    2.  
    3. Tighten the torque converter-to-drive plate bolts in 2 steps to 38 ft. lbs. (51 Nm)
    4.  
    5. Lower the vehicle.
    6.  
    7. Fill the transmission with fluid.
    8.  
    9. Connect negative battery cable.
    10.  
    11. Start the vehicle, check for leaks and repair if necessary.
    12.  

  2.  

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Remove or disconnect the following:

    Negative battery cable
     
    Crankshaft Position (CKP) sensor
     
    Rear Heated O 2 S sensor connector
     
    Exhaust tubes
     
    Fluid charging pipe
     
    Oil cooler lines. Plug fluid charging and oil cooler fittings after removing lines.
     
    Control linkage from the selector lever
     
    Neutral safety switch and solenoid harness connectors
     
    Speed sensor connection
     
    Driveshaft (make matchmarks to ease in installation). Insert plug into rear seal opening to prevent loss of fluid.
     

  4.  
  5. Support the transmission safely.
    NOTE
    The bolts securing the transmission to the engine are of different lengths. Note the length of the bolts as they are removed.



    Bolts securing the torque converter to the flexplate
     
    Gussets securing the transmission to the engine
     
    Bolts attaching the transmission to the engine
     

  6.  
  7. Support the engine safely. Avoid jacking directly under the oil pan drain plug.
  8.  
  9. Remove the transmission from the vehicle.
  10.  

To install:

  1. Install or connect the following:

    Transmission in the vehicle and install the torque converter-to-flexplate bolts. Torque the bolts to 33-43 ft. lbs. (44-59 Nm)
     

  2.  
  3. Secure the transmission to the engine. Torque the bolts as follows:
    1. 70mm bolts: 80-87 ft. lbs. (108-118 Nm).
    2.  
    3. 90mm bolts: 51-58 ft. lbs. (69-78 Nm).
    4.  

  4.  
  5. Install the torque converter-to-drive plate bolts and torque in 2 steps to 33-43 ft. lbs. (44-59 Nm).

    Driveshaft, aligning the matchmarks made before removal
     

  6.  
  7. Install or connect the following:

    Speed sensor connection
     
    Neutral safety switch and solenoid harness connectors
     
    Control linkage to the selector lever
     
    Fluid charging and oil cooler lines
     
    Exhaust tubes
     

  8.  
  9. Lower the vehicle.
  10.  
  11. Connect negative battery cable.
  12.  
  13. Start the vehicle, check for leaks and repair if necessary.
  14.  

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Remove or disconnect the following:

    Negative battery cable
     
    Crankshaft Position (CKP) sensor
     
    Rear Heated Oxygen Sensor (HO 2 S) connector
     
    Exhaust tubes
     
    Fluid charging pipe
     
    Oil cooler lines. Plug fluid charging and oil cooler fittings after removing the lines.
     
    Control linkage from the selector lever
     
    Neutral safety switch and solenoid harness connectors
     
    Speed sensor connection
     
    Driveshaft (make matchmarks to ease in installation). Insert plug into rear seal opening to prevent loss of fluid.
     

  4.  
  5. Support the transmission safely.
    NOTE
    The bolts securing the transmission to the engine are of different lengths. Note the length of the bolts as they are removed.



    Bolts securing the torque converter to the flexplate
     
    Gussets securing the transmission to the engine
     
    Bolts attaching the transmission to the engine
     

  6.  
  7. Support the engine safely. Avoid jacking directly under the oil pan drain plug.
  8.  
  9. Remove the transmission from the vehicle.
  10.  

To install:

  1. Install or connect the following:

    Transmission in the vehicle and install the torque converter-to-flexplate bolts. Torque the bolts to 33-43 ft. lbs. (44-59 Nm).
     

  2.  
  3. Secure the transmission to the engine. Torque the bolts as follows:
    1. 70mm bolts: 80-87 ft. lbs. (108-118 Nm).
    2.  
    3. 90mm bolts: 51-58 ft. lbs. (69-78 Nm).

      Torque converter-to-drive plate bolts and tighten in 2 steps to 33-43 ft. lbs. (44-59 Nm)
       
      Driveshaft, aligning the matchmarks made before removal
       
      Speed sensor connection
       
      Neutral safety switch and solenoid harness connectors
       
      Control linkage to the selector lever
       
      Fluid charging and oil cooler lines
       
      Exhaust tubes
       

    4.  

  4.  
  5. Lower the vehicle.
  6.  
  7. Fill the transmission with fluid.
  8.  
  9. Connect negative battery cable.
  10.  
  11. Start the vehicle, check for leaks and repair if necessary.
  12.  

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Remove or disconnect the following:

    Negative battery cable
     
    Engine splash shield
     
    Front cross bar (if equipped)
     
    Front exhaust tube and center muffler
     
    Driveshaft (make matchmarks to ease in installation). Insert plug into rear seal opening to prevent loss of fluid.
     
    Transmission control rod
     
    Transmission harness connectors
     
    Crankshaft Position (CKP) sensor
     
    Oil cooler lines
     
    Breather hose
     
    Starter
     
    Torque converter cover
     
    Torque converter bolts
     

  4.  
  5. Place a transmission jack under the transmission
  6.  
  7. Remove or disconnect the following:

    Rear engine crossmember
     
    Transmission-to-engine bolts
     
    Transmission

    Click image to see an enlarged view

    Fig. Exploded view of the automatic transmission mounting-2004-2005 Q45 and M45

     

  8.  

To install:

  1. Installation is the reverse of the removal procedure, noting the following:
    1. When installing the transmission, note the correct bolt locations. The 65 mm bolts are the four bolts at the bottom. Tighten the 65 mm bolts to 55 ft. lbs. (74 Nm) and the 70 mm bolts to 84 ft. lbs. (114 Nm).
    2.  
    3. Tighten the torque converter-to-drive plate bolts in 2 steps to 38 ft. lbs. (51 Nm)
    4.  
    5. Lower the vehicle.
    6.  
    7. Fill the transmission with fluid.
    8.  
    9. Connect negative battery cable.
    10.  
    11. Start the vehicle, check for leaks and repair if necessary.
    12.  

  2.  

 
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