Adjustment

DIFFERENTIAL ASSEMBLY

Adjustment


TOTAL PRELOAD TORQUE

1.Install the differential side shaft. Refer to "Assembly" Assembly.
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 with the preload gauge [SST:
ST3127S000 (J-25765-A)].
Total preload torque: Refer to "Preload Torque" Preload Torque.
NOTE:
Total preload torque = Drive pinion bearing preload torque +
Side bearing 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.
When the preload torque is large


On drive pinion bearings:Decrease the drive pinion bearing adjusting washer and drive
pinion adjusting washer thickness. For selecting adjusting
washer, refer to the latest parts information.
On side bearings:Increase the side bearing adjusting washer thickness. For selecting adjusting washer, refer to the latest parts information.
When the preload torque is small
On drive pinion bearings:Increase the drive pinion bearing adjusting washer and drive
pinion adjusting washer thickness. For selecting adjusting
washer, refer to the latest parts information.
On side bearings:Decrease the side bearing adjusting washer thickness. For selecting adjusting washer, refer to the latest parts information.

DRIVE GEAR RUNOUT

1.Remove carrier cover. Refer to "Disassembly" Disassembly.





2.Fit a dial indicator to the drive gear back face.
3.Rotate the drive gear to measure runout.
Drive gear runout: Refer to "Drive Gear Runout" Drive Gear Runout.
- If the runout is outside of the repair limit, check drive gear assembly condition; foreign material may be caught between the drive gear and differential case, or differential case or drive gear may be deformed.

CAUTION:
Replace drive gear and drive pinion as a set.

TOOTH CONTACT

1.Remove carrier cover. Refer to "Disassembly" Disassembly.





2.Apply red lead to the drive gear.

CAUTION:
Apply red lead to both the faces of 3 to 4 gears at 4 locations evenly spaced on the drive gear.





3.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.










4.If the tooth contact is improperly adjusted, adjust the drive pinion height (dimension X).





- 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
For selecting adjusting washer, refer to the latest parts information.





- 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.
For selecting adjusting washer, refer to the latest parts information.

BACKLASH

1.Remove carrier cover. Refer to "Disassembly" Disassembly.





2.Fit a dial indicator to the drive gear face to measure the backlash.
Backlash: Refer to "Backlash" Backlash.
- If the backlash is outside of the specification, change the thickness of the side bearing adjusting washers.
When the backlash is large:


Make drive gear back side adjusting washer thicker,
and drive tooth side adjusting washer thinner by the
same amount. For selecting adjusting washer, refer to
the latest parts information.
If the backlash is less than specification:
Make drive gear back side adjusting washer thinner,
and drive tooth side adjusting washer thicker by the
same amount. For selecting adjusting washer, refer to
the latest parts information.

CAUTION:
Never change the total amount of washers as it changes the preload torque.