Infinity_FX35_FX45_2003-2005

Removal & Installation

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Front Driveshafts





Click image to see an enlarged view

Fig. Front driveshaft-AWD Models

  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Raise and safely support the vehicle.
  4.  
  5. Remove the front and rear engine undercover.
  6.  
  7. Remove the front cross bar.
  8.  
  9. Remove the exhaust front tube bracket.
  10.  
  11. Disconnect the heated oxygen sensor wiring harness connector.
  12.  
  13. Remove the exhaust front tube mounting nuts.
  14.  
  15. Remove the right bank catalytic converter.
  16.  
  17. Remove the power steering piping mounting bolts.
  18.  
  19. Remove the power steering gear box fixing bolts to secure the working area for removal of the driveshaft.
    CAUTION
    Be careful not to damage the steering gear box piping during removal.

  20.  
  21. Put matching marks on the driveshaft flange and the companion flange on the front drive assembly.
    CAUTION
    For matching mark, use paint. Never damage the driveshaft flange and companion flange on the front drive.

  22.  
  23. Set a transmission jack under the transfer, remove the mounting bolts and rear engine mounting bracket. On the 4.5L engine, lower the transmission jack about 0.16 - 0.20 in. (40 - 50mm).
  24.  
  25. Remove the bolts and then remove the driveshaft from the front final drive and transfer.

    Click image to see an enlarged view

    Fig. Checking driveshaft runout

  26.  
  27. Inspect the driveshaft runout as shown. If runout exceeds specifications, replace the driveshaft assembly. Runout limit: 0.8 mm (0.031 in.).

    Click image to see an enlarged view

    Fig. Checking driveshaft U-joint axial play

  28.  
  29. As shown in the accompanying illustration, fix the yoke on one side and check the axial play of the joint. The standard is 0 , therefore if there is any play, replace the driveshaft assembly.
  30.  
  31. Check the driveshaft for bending and damage. If damage is detected, replace the driveshaft assembly.
  32.  

To install:

  1. Install the driveshaft into the transfer, then install the driveshaft onto the front final drive flange while the matching marks are aligned.
  2.  
  3. Tighten the drive flange bolts to 29 ft. lbs. (39 Nm).
    CAUTION
    Do not reuse the bolts and nuts. Always replace them with new ones.

  4.  
  5. The remainder of installation is the reverse of removal.
  6.  
  7. After installation, check the vibration by driving the vehicle. If vibration is present, remove the driveshaft from the final drive companion flange and turn the driveshaft 90, 180 or 270 degrees. Then, reinstall the driveshaft onto the companion flange.
  8.  
  9. Recheck vibration by driving the vehicle.
  10.  

Rear Driveshafts



2003 - 04 Models


Click image to see an enlarged view

Fig. Exploded view of the three rear driveshaft configurations-2003 - 04 models

  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Move the A/T select lever to N position and release the parking brake.
  4.  
  5. Raise and safely support the vehicle.
  6.  
  7. Remove the tunnel stay.
  8.  
  9. Remove the center muffler.
  10.  
  11. Loosen the center bearing lower mounting bracket fixing nuts.
  12.  
  13. Put matching marks on the flange and the rear driveshaft.
    CAUTION
    For matching marks, use paint. Never damage the driveshaft flange and companion flange on the rear final drive.

  14.  
  15. Remove the driveshaft fixing bolts and nuts.
  16.  
  17. Remove the center bearing lower mounting bracket fixing nuts, remove the driveshaft from the vehicle.
  18.  
  19. Inspect driveshaft run out. Measure run out at the points shown below. If run out exceeds 0 in. (0mm), replace the driveshaft assembly.
  20.  

2WD models:



Position A: 192mm
 
Position B: 190mm
 
Position C: 185mm
 

2WD models:



Position A: 162mm
 
Position B: 245mm
 
Position C: 185mm
 

To install:


NOTE
During installation, refer to the following torque specifications:

2WD models with 3.5L engine:



Center flange attaching bolts and nuts: 70 ft. lbs. (95 Nm)
 
First (front-most) flange-to-flange attaching nut: 61 ft. lbs. (83 Nm)
 
Center bearing lower mounting bracket nuts: 32 ft. lbs. (44 Nm)
 
Second (rear-most) rear-to-rear drive unit fasteners: 42 ft. lbs. (57 Nm)
 

AWD models with 3.5L engine:



First (front-most) transmission-to-transmission attaching nuts and bolts: 54 ft. lbs. (74 Nm)
 
Center flange-to-first driveshaft attaching bolts and nuts: 70 ft. lbs. (95 Nm)
 
Second (rear-most) flange-to-flange center attaching nut: 61 ft. lbs. (83 Nm)
 
Center bearing lower mounting bracket nuts: 32 ft. lbs. (44 Nm)
 
Second (rear-most) rear-to-rear drive unit fasteners: 42 ft. lbs. (57 Nm)
 

AWD models with 4.5L engine:



First (front-most) transmission-to-transmission attaching nuts and bolts: 54 ft. lbs. (74 Nm)
 
First (front-most) flange-to-flange center attaching nut: 144 ft. lbs. (195 Nm)
 
Center bearing lower mounting bracket nuts: 32 ft. lbs. (44 Nm)
 
Center flange-to-second driveshaft attaching bolts and nuts: 70 ft. lbs. (95 Nm)
 
Second (rear-most) rear-to-rear drive unit fasteners: 42 ft. lbs. (57 Nm)
 

  1. Install the driveshaft onto the rear final drive companion flange while aligning the matching marks that were made during removal.
  2.  
  3. Adjust the position of the bearing cushion so as not to apply thrust play to the center bearing insulator.
  4.  
  5. Position the bearing cushion overlap as shown in the accompanying illustration.
  6.  
  7. Install the center bearing upper bracket with its arrow mark facing forward.
  8.  
  9. Tighten the center bearing upper mounting bracket fixing nuts to specified torque.
    CAUTION
    Do not reuse the nuts. Always replace the nuts with a new ones.

  10.  
  11. If the companion flange has been removed, put a new alignment matching mark C on it. Then, reassemble using the following procedure:
    NOTE
    Also, perform these steps when either of final drive and driveshaft is replaced with a new one.

    1. Erase the original mark C from companion flange with suitable solvent.
    2.  
    3. Measure the companion flange vertical run-out.
    4.  
    5. Determine the position where maximum run out is read on the dial indicator. Put a mark (shown by C in figure) on the flange perimeter corresponding to the maximum run out position.
    6.  

  12.  
  13. If the driveshaft or final drive has been replaced, connect the driveshaft and final drive as follows:
    NOTE
    Avoid damaging the joint boot. Protect it with a shop towel or equivalent.

    1. Install the driveshaft while aligning its matching mark A with the mark C on the joint as close as possible.
    2.  
    3. Tighten the joint bolts/nuts to the specified torque.
      CAUTION
      Do not reuse the bolts, and washers. Always replace the them with new ones.

    4.  

  14.  
  15. After installation, check driveline vibration by driving the vehicle. If vibration is present, remove the driveshaft from the final drive companion flange.
  16.  
  17. Turn the driveshaft 60, 120, 180, 240 or 300 degrees and reinstall the driveshaft to the companion flange, then check for vibration again by driving the vehicle on each angle position.
  18.  
  19. The remainder of installation is the reverse of removal.
  20.  

2005 Models


Click image to see an enlarged view

Fig. Rear driveshaft-2005 2WD models



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Fig. Rear driveshaft-2005 4WD models

  1. Move the A/T select lever to N position and release the parking brake.
  2.  
  3. Remove the tunnel stay.

    Click image to see an enlarged view

    Fig. Remove the tunnel stay

  4.  
  5. Before servicing the vehicle, refer to the Precautions Section.
  6.  
  7. Raise and safely support the vehicle.
  8.  
  9. Remove the center muffler.
  10.  
  11. Loosen mounting nuts of center bearing mounting brackets.
    NOTE
    Tighten mounting nuts temporarily.

  12.  
  13. For 2WD models, matchmark the driveshaft Rebro joint and final drive companion flange.
    NOTE
    Do not damage the driveshaft and companion flange.



    Click image to see an enlarged view

    Fig. Matchmark the joints

  14.  
  15. For AWD models, matchmark the driveshaft flange yoke and transfer companion flange, and the Rebro joint with the final drive companion flange.
  16.  
  17. Remove the driveshaft fixing bolts and nuts.
  18.  
  19. Remove the center bearing mounting bracket fixing nuts.
  20.  
  21. Remove the driveshaft.
    NOTE
    If the constant velocity joint was bent during driveshaft assembly removal, installation, or transportation, its boot may be damaged. Wrap the boot interference area to metal part with shop cloth or rubber to protect boot from breakage.



    Click image to see an enlarged view

    Fig. Checking rear driveshaft runout

  22.  
  23. Inspect the driveshaft runout as shown. If runout exceeds specifications, replace the driveshaft assembly. Driveshaft runout limit: 0.8 mm (0.031 in.).

    Click image to see an enlarged view

    Fig. Checking rear driveshaft U-joint axial play

  24.  
  25. Check the axial play of the U-joint. If any play is noted, replace the U-joint. Check the driveshaft for bend and damage. If damage is detected, replace the driveshaft.
    NOTE
    Do not disassemble joints.

  26.  
  27. Check the center bearing for noise and damage. If noise or damage is detected, replace the center bearing.
  28.  

To install:

  1. Installation is the reverse of removal. Note the following:
    NOTE
    Avoid damaging the Rebro joint boot, protect it with a shop towel or equivalent.

    1. Align matching marks to install driveshaft to final drive and transfer (AWD models only) companion flanges, and then tighten to the torques shown in the accompanying illustrations.

      Click image to see an enlarged view

      Fig. Correct center bearing installation-2005 models

    2.  
    3. Install center bearing mounting bracket (upper) with its arrow mark facing forward.
    4.  
    5. Adjust position of mounting bracket sliding back and forth to prevent play in thrust direction of center bearing insulator. Install bracket to vehicle.
    6.  
    7. After assembly, perform a driving test to check driveshaft vibration. If vibration occurred, separate driveshaft from final drive. Reinstall companion flange after rotating it by 60, 120, 180, 240, 300 degrees. Then perform driving test and check driveshaft vibration again at each point.
    8.  
    9. If driveshaft or final drive has been replaced, connect them as follows: Install the driveshaft while aligning its matching mark A with the matching mark B on the joint as close as possible. Tighten the joint bolts to the specified torque.
      NOTE
      Do not reuse the bolts, nuts and washers.

    10.  

  2.  

 
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