 TOTAL PRELOAD TORQUE
- Before inspection and adjustment, drain gear oil.
1.Rotate drive pinion back and forth 2 to 3 times to check for unusual noise and rotation malfunction.
2.Rotate drive pinion at least 20 times to check for smooth operation of the bearing.

3.Measure total preload with preload gauge (A) [SST: ST3127S000 (J-25765-A)].
NOTE: Total preload torque = Pinion bearing preload torque + Side bearing preload torque
- If measured value is out of the specification, disassemble it to check and adjust each part. Adjust the pinion bearing preload and side bearing preload.Adjust the pinion bearing preload first, then adjust the side bearing preload.
When the preload torque is large
| On pinion bearings:
| Decrease the drive pinion bearing adjusting washer and drive pinion adjusting washer thickness.
| On side bearings:
| Increase the side bearing adjusting shim thickness. For select parts refer to parts information.
|
When the preload torque is small
| On pinion bearings:
| Increase the drive pinion bearing adjusting washer and drive pinion adjusting washer thickness.
| On side bearings:
| Decrease the side bearing adjusting shim thickness. For select parts refer to parts information.
|
 SIDE BEARING PRELOAD
 DRIVE GEAR RUNOUT
1.Remove carrier cover. Refer to Disassembly (GT-R certified NISSAN dealer).
2.Fit a dial indicator to the drive gear back face.

3.Rotate the drive gear to measure runout.
- If the runout is outside of the repair limit, check drive gear assembly condition; foreign material may be caught between drive gear and differential case, or differential case or drive gear may be deformed, etc.
■ CAUTION ■ Replace drive gear and drive pinion gear as a set.
 TOOTH CONTACT
 BACKLASH
Before inspection and adjustment, drain gear oil. 1.Remove carrier cover. Refer to Disassembly (GT-R certified NISSAN dealer). 2.Fit a dial indicator to the drive gear face to measure the backlash.

- If the backlash is outside of the specified value, change the thickness of side bearing adjusting washer.
When the backlash is large:
|
| Decrease side bearing adjusting washer thickness.
| When the backlash is small:
|
| Increase side bearing adjusting washer thickness.
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|