Front Final Drive: Adjustments Nissan Pathfinder III

ASSEMBLY INSPECTION AND ADJUSTMENT

1. Drain the differential gear oil before inspection and adjustment. Refer to " «DIFFERENTIAL GEAR OIL»(ref-272540-S20544703342007112100000) ".
2. Remove and install the carrier cover as necessary for inspection and adjustment. Refer to " «CARRIER COVER»(ref-272540-S18719433572007112100000) ".

Scheme 1

1. Install the differential side shaft if necessary. Refer to " «DIFFERENTIAL SIDE SHAFT»(ref-272540-S26838595792007112100000) ". CAUTION: The differential side shaft must be installed in order to measure total preload torque.
2. Rotate the drive pinion back and forth 2 to 3 times to check for unusual noise and rotation malfunction.
3. Rotate the drive pinion at least 20 times to check for smooth operation of the bearings.
4. Measure total preload torque using Tool. Tool number: ST3127S000 (J-25765-A) Total preload torque: 1.67 - 2.74 N.m (0.17 - 0.27 kg-m, 15 - 24 in-lb) NOTE: Total preload torque = Drive pinion bearing preload torque + Side bearing preload torque see scheme 18: Measuring Total Preload Torque If the measured value is out of the specification, check and adjust each part. Adjust the drive pinion bearing preload torque first, then adjust the side bearing preload torque. If the total preload torque is greater than specification On drive pinion bearings: Replace the collapsible spacer. On side bearings: Use thinner side bearing adjusting washers by the same amount on each side. Refer to " «SIDE BEARING ADJUSTING WASHER»(ref-272540-S24301375682007112100000) ". If the total preload torque is less than specification On drive pinion bearings: Tighten the drive pinion lock nut. On side bearings: Use thicker side bearing adjusting washers by the same amount on each side. Refer to " «SIDE BEARING ADJUSTING WASHER»(ref-272540-S24301375682007112100000) ". CAUTION: Select a side bearing adjusting washer for right and left individually.

Scheme 2

1. Fit a dial indicator to the drive gear back face.
2. Rotate the drive gear to measure runout. Runout limit: 0.08 mm (0.0031 in) or less If the runout is outside of the limit, check the condition of the drive gear assembly. Foreign material may be caught between the drive gear and differential case, or the differential case or drive gear may be deformed. CAUTION: Replace drive gear and drive pinion as a set. see scheme 19: Checking Drive Gear Runout

Scheme 3

Scheme 4

Scheme 5

Scheme 6

Scheme 7

1. Apply red lead to the drive gear. NOTE: Apply red lead to both faces of three to four gears, at four locations evenly spaced on the drive gear. see scheme 20: Applying Red Lead To Drive Gear
2. Rotate the drive gear back and forth several times. Then check for correct drive pinion to drive gear tooth contact as shown. CAUTION: Check tooth contact on drive side and reverse side. see scheme 21: Checking Drive Pinion Gear To Drive Gear Tooth Contact If the tooth contact is improperly adjusted, adjust the drive pinion height (dimension X). see scheme 22: Adjusting Pinion Height If the tooth contact is near the face (face contact), or near the heel (heel contact), use a thicker drive pinion height adjusting washer to move drive pinion closer to the drive gear. Refer to " «DRIVE PINION HEIGHT ADJUSTING WASHER»(ref-272540-S37891576602007112100000) ". see scheme 23: Identifying Face Contact If the tooth contact is near the flank (flank contact), or near the toe (toe contact), use a thinner drive pinion height adjusting washer to move the drive pinion farther from the drive gear. Refer to " «DRIVE PINION HEIGHT ADJUSTING WASHER»(ref-272540-S37891576602007112100000) ". see scheme 24: Identifying Flank Contact

Scheme 8

1. Fit a dial indicator to the drive gear face to measure the backlash. Backlash: 0.10 - 0.15 mm (0.0039 - 0.0059 in) If the backlash is outside of the specification, change the thickness of the side bearing adjusting washers. If the backlash is greater than specification: Make side bearing adjusting washer thicker on drive gear back side, and side bearing adjusting washer thinner on drive gear tooth side by the same amount. Refer to " «SIDE BEARING ADJUSTING WASHER»(ref-272540-S24301375682007112100000) ". If the backlash is less than specification: Make side bearing adjusting washer thinner on drive gear back side, and side bearing adjusting washer thicker on drive gear tooth side by the same amount. Refer to " «SIDE BEARING ADJUSTING WASHER»(ref-272540-S24301375682007112100000) ". see scheme 25: Measuring Backlash CAUTION: Do not change the total thickness of side bearing adjusting washers as it will change the side bearing preload torque.