PINION GEAR HEIGHT If the hypoid gear set has been replaced, select the pinion height adjusting washer.

1.Use the formula below to calculate pinion height adjusting washer thickness.

Washer selection equation:
T = T0 + (t1− t2)
| T: | Correct washer thickness
| T0: | Removed washer thickness
| t1: | Old drive pinion head letter “H × 0.01” (“H”: machined tolerance 1/100 mm × 100)
| t2: | New drive pinion head letter “H × 0.01” (“H”: machined tolerance 1/100 mm × 100)

Example:
T = 3.21 + [(2 × 0.01) − (−1 × 0.01)] = 3.24
| T0: | 3.21
| t1: | +2
| t2: | −1

2.Select the proper pinion height adjusting washer.If unable to find a washer of desired thickness, use a washer with thickness closest to the calculated value.

Example: |
| Calculated value... T = 3.22 mm
| Used washer... T = 3.21 mm

PINION BEARING PRELOAD
Assemble the drive pinion parts if they are disassembled. Refer to Assembly (GT-R certified NISSAN dealer).

1.Make sure all parts are clean. Also, make sure the bearings are well lubricated with gear oil.

2.Install companion flange (1).
NOTE：
When reusing drive pinion, align the matching mark (B) of drive pinion with the matching mark (A) of companion flange, and then install companion flange (1).

3.Temporarily tighten removed drive pinion lock nut to drive pinion.
NOTE：
Use removed drive pinion lock nut only for the preload measurement.

4.Rotate drive pinion at least 20 times to check for smooth operation of the bearing.

5.Tighten to drive pinion lock nut, while adjust pinion bearing preload torque.

A: Preload gauge [SST: ST3127S000 (J-25765-A)]

Standard
Pinion bearing preload | : Refer to Preload Torque (GT-R certified NISSAN dealer).

■ CAUTION ■

- Adjust to the lower limit of the drive pinion lock nut tightening torque first.
- After adjustment, rotate drive pinion back and forth 2 to 3 times to check for unusual noise, rotation malfunction, and other malfunctions.

6.If the pinion bearing preload torque is outside the specification, use a thicker/thinner drive pinion bearing adjusting washer and drive pinion adjusting washer to adjust.

When the preload torque is large:
| Decrease the drive pinion bearing adjusting washer and drive pinion adjusting washer thickness. For select parts refer to parts information.
When the preload is small:
| Increase the drive pinion bearing adjusting washer and drive pinion adjusting washer thickness. For select parts refer to parts information.

7.Remove companion flange, after adjustment.

COMPANION FLANGE RUNOUT

1.Fit a dial indicator onto the companion flange face (inner side of the propeller shaft mounting bolt holes).

2.Rotate companion flange to check for runout.

Limit
Companion flange runout | : Refer to Companion Flange Runout (GT-R certified NISSAN dealer).

3.Fit a test indicator to the inner side of companion flange (socket diameter).

4.Rotate companion flange to check for runout.

Limit
Companion flange runout | : Refer to Companion Flange Runout (GT-R certified NISSAN dealer).

5.If the runout value is outside the runout limit, follow the procedure below to adjust.

(1)Check for runout while changing the phase between companion flange and drive pinion by 90° step, and search for the position where the runout is the minimum.

(2)If the runout value is still outside of the limit after the phase has been changed, possible cause will be an assembly malfunction of drive pinion and pinion bearing and malfunction of pinion bearing. Check for these items and repair if necessary.

(3)If the runout value is still outside of the limit after the check and repair, replace companion flange.