Adjustment of Drive Gear and Drive Pinion Assembly
SIDE BEARING PRELOADNOTE: A selection of carrier side bearing adjusting washers is required for completion of this procedure.
1. All parts must be clean. The bearings must be well lubricated with light oil or DEXRON type automatic transmission fluid.
2. Place the differential case assembly, with the side bearing outer races installed, into the gear carrier.
3. Insert the left and right side bearing adjusting washers in position between the side bearings and the gear carrier as shown.
4. Install the side bearing caps in their original locations marked during disassembly, and tighten the bearing cap bolts to specification.
Bearing cap bolts: 93 Nm (9.5 kg-m, 69 ft. lbs.)
5. Turn the carrier several times to seat the bearings.
6. Measure the turning force of the carrier at the drive gear retaining bolts using a suitable spring gauge.
Drive gear bolt pulling force: 29.4 - 147 N (3 - 15 kg-f, 22 - 108 ft. lbs.)
7. If the turning force is not within the specification, adjust the turning force.
^ If the turning force is less than specification, install thicker washers.
^ If the turning force is greater than specification, install thinner washers.
^ Select the correct washer size to adjust the turning force.
8. Record the selected washer thickness required for the correct carrier side bearing preload.
9. Remove the differential case assembly from the gear carrier using Tool. Save the selected side bearing adjusting washers for assembly
Tool number: HT72400000 ( - )
TOOTH CONTACT
NOTE:
Checking the gear tooth contact pattern is necessary to verify that there is the correct tooth contact between the drive gear and the drive pinion.
Hypoid gears which are not positioned properly may be noisy or have a short service life. Check the gear tooth contact pattern to obtain the best contact for low noise and long service life.
1. Thoroughly clean the drive gear and drive pinion teeth.
2. Lightly apply a mixture of powdered ferric oxide and oil or the equivalent. Apply it to 3 or 4 teeth of the drive gear drive side.
3. Use your hand to hold the companion flange steady and rotate the drive gear in both directions.
4. Check the tooth contact as shown.
ASSEMBLY OF DIFFERENTIAL CASE ASSEMBLY
1. Install the pinion mate shaft lock pin using a suitable punch as shown. The lock pin must be flush with the case.
2. Place the differential case on the drive gear.
3. Apply genuine medium strength locking sealant or equivalent as shown.
^ Tighten the drive gear bolts in a crisscross pattern to specification.
Drive gear bolts
Step 1: 78.5 Nm (8.0 kg-m, 58 ft. lbs.)
Step 2: 34°
4. Press-fit the side bearing inner races on the differential case using Tools.
Tool number
A: KV38100200 (J-26233)
B: ST33081000 ( - )
INSTALLATION OF DRIVE PINION ASSEMBLY
1. Press-fit the pinion front and rear bearing outer races using Tools.
Tool number
A: ST15310000 ( - )
B: ST35325000 ( - )
C: ST30621000 ( - )
2. Select pinion height adjusting washer.
3. Install the selected pinion height adjusting washer in the drive pinion. Using a suitable press and Tool, press-fit pinion rear bearing inner race into the drive pinion.
Tool number: ST30022000 ( - )
4. Apply multi-purpose grease to the pinion rear bearing inner race and pinion front bearing inner race.
5. Set the drive pinion assembly in the differential carrier as shown, and install drive pinion using a suitable press and suitable tool. Stop when drive pinion touches the bearing.
6. Install the front oil seal using Tool.
7. Install the companion flange, and tighten the pinion nut to a minimum using Tool. Check that the threaded portion of the drive pinion and drive pinion nut are free of oil or grease.
Tool number: KV40104000 ( - )
CAUTION: The drive pinion nut is not reusable. Use a new drive pinion nut for installation.
8. Tighten the drive pinion nut by very small increments until the specified preload is achieved, when checking the preload, turn drive pinion in both directions several times.
Tool number: ST3127S000 (J-25765-A)
Pinion bearing preload 1.77 - 2.64 Nm (0.18 - 0.26 kg-m, 16 - 23 inch lbs.)
^ If the pinion bearing preload is less than specification, tighten the drive pinion nut.
^ If pinion bearing preload is greater than specification, replace the pinion bearing adjusting spacer.
INSTALLATION OF DIFFERENTIAL CASE ASSEMBLY
1. Select the side bearing adjusting washer.
2. Install the differential case assembly with side bearing outer races into the gear carrier.
3. Insert the left and right side bearing adjusting washers into place between the side bearings and the gear carrier.
4. Install the side bearing caps. Align the matching mark on the bearing cap with the matching mark on the gear carrier, and tighten the bearing cap bolts to specification.
Bearing cap bolts: 93 Nm (9.5 kg-m, 69 ft. lbs.)
5. Install the side oil seals.
6. Measure the drive gear-to-drive pinion backlash with a dial indicator at several points.
Drive gear to drive pinion backlash: 0.13 - 0.18 mm (0.0051 - 0.0070 inch)
^ If the backlash is less than specification, adjust the washer thickness. Decrease the thickness of the left washer and increase the thickness of the right washer by the same amount.
^ If the backlash is greater than specification, adjust the washer thickness. Increase the thickness of the left washer and decrease the thickness of the right washer by the same amount.
^ Never change the total amount of the washers as it will change the bearing preload.
7. Check the total preload using Tool.
Tool number: ST3127S000 (J-25765-A)
When checking the preload, turn the drive pinion in both directions several times to seat the bearing rollers correctly.
Total preload: 2.05 - 4.11 Nm (0.21 - 0.42 kg-m, 19 - 36 inch lbs.)
^ If the preload is greater than specification, remove the same amount of washer thickness from each side.
^ If the preload is less than specification, add the same amount of washer thickness to each side.
^ Never add or remove a different amount of washer thickness from each side. A difference in the amount of washer thickness will change the drive gear-to-drive pinion backlash.
8. Recheck the drive gear-to-drive pinion backlash. Increase or decrease in thickness of the washers will change the drive gear-to-drive pinion backlash.
^ Check whether the backlash varies excessively in different places. Foreign matter may be caught between the drive gear and the differential case causing the variation in backlash.
^ The backlash can vary greatly even when the drive gear runout is within specification. To correct this variation, replace the hypoid gear set or differential case.
9. Check runout of drive gear using a dial indicator.
Runout limit: 0.05 mm (0.0020 inch) or less
10. Check the tooth contact.
11. Install the rear cover on the gear carrier. Apply Genuine NISSAN RTV Sealant or equivalent, to the rear cover as shown.
Rear cover bolts: 44 Nm (4.5 kg-m, 32 ft. lbs.)