Part 2

REAR FINAL DRIVE ASSEMBLY


Disassembly and Assembly






4. Remove companion flange using suitable tool.
5. Remove front oil seal using Tool.






Tool number : ST33290001 (J-34286)


CAUTION:
Do not damage gear carrier.
6. Remove drive pinion front bearing thrust washer.





7. Remove drive pinion assembly (with rear inner bearing race and collapsible spacer) out of gear carrier.

CAUTION:
Do not drop drive pinion assembly.
8. Remove drive pinion front bearing inner race from gear carrier.





9. Tap drive pinion front bearing outer race uniformly with a brass bar or equivalent to remove.

CAUTION:
Do not damage gear carrier.
10. Tap drive pinion rear bearing outer race uniformly with a brass bar or equivalent for removal.

CAUTION:
Do not damage gear carrier.





11. Remove drive pinion rear bearing inner race and drive pinion height adjusting washer using Tool.

Tool number : ST30021000 (J-22912-01)


INSPECTION AFTER DISASSEMBLY

Drive Pinion and Drive Gear
- If the drive pinion and drive gear teeth do not mesh or line-up correctly, determine the cause and adjust, repair, or replace as necessary.
- If the drive pinion or drive gear are worn, cracked, damaged, pitted or chipped (by friction) noticeably, replace with new drive pinion and drive gear.
- Drive pinion and drive gear are supplied in matched sets only. Matching numbers on both drive pinion and drive gear are etched for verification. If a new drive pinion and drive gear set are being used, verify the numbers of each drive pinion and drive gear before proceeding with assembly.

Bearing
- If bearings are chipped (by friction), pitted, worn, rusted, scratched, or unusual noise is coming from bearing, replace with new bearing assembly (as a new set).
- Bearing must be replaced with a new one whenever disassembled.

Side Gear and Pinion Mate Gear
- If any cracks or damage are found on the surface of the teeth, replace with new one.
- If any worn or chipped marks are found on the side of the side gear and pinion mate gear which contact the thrust washer, replace with new one.
- Replace both side gear and pinion mate gear as a set when replacing side gear or pinion mate gear.

Side Gear Thrust Washer and Pinion Mate Thrust Washer
- If any chips (by friction), damage, or unusual wear are found, replace with new one.

Gear Carrier
- If any wear or cracks are found on the contact sides of gear carrier, replace with new one.

Companion Flange
- If any chips (about 0.1mm, 0.004 in) or other damage on the companion flange surface which contacts the front oil seal lips are found, replace with new one.

SELECTION ADJUSTING WASHERS

Side Gear Back Clearance
- Assemble the differential parts if they are disassembled. Refer to "Disassembly and Assembly".





1. Place the differential case straight up so that the side gear to be measured is upward.





2. Using feeler gauges, measure the clearance between the side gear back and differential case at three different points, while rotating the side gear. Average the three readings to calculate the clearance. (Measure the clearance of the other side as well.)

Side gear back clearance: 0.305 mm (0.0120 in) or less.

- If the side gear back clearance is outside of the specification, use a thicker or thinner side gear thrust washer to adjust. Refer to Inspection And Adjustment.






CAUTION:
- Insert feeler gauges with the same thickness on both sides to prevent side gear from tilting.
- Each gear should rotate smoothly without excessive resistance during differential motion.
- Select a side gear thrust washer for right and left individually.

NOTE:
Side gear back clearance is clearance between side gear and differential case for adjusting side gear backlash.

Drive Pinion Height Adjusting Washer




- Drive gear and drive pinion are supplied in matched sets only. Matching numbers on both drive pinion and drive gear are etched for verification. If a new gear set is being used, verify the numbers of each drive pinion and drive gear before proceeding with assembly.
- The mounting distance from the center line of drive gear to the back face of drive pinion for the Model 226 final drive assembly is 109.5 mm (4.312 in).
On the button end of each drive pinion, there is etched a plus (+) number, a minus (-) number, or a zero (0), which indicates the best running position for each particular gear set. This dimension is controlled by a selective drive pinion height adjusting washer between drive pinion inner bearing race and drive pinion.
For example: If a drive pinion is etched m+8 (+3), it would require 0.08 mm (0.003 in) less drive pinion height adjusting washer than a drive pinion etched "0". This means decreasing drive pinion height adjusting washer thickness; increases the mounting distance of drive pinion to 109.6 mm (4.315 in). If a drive pinion is etched m-8 (-3), it would require adding 0.08 mm (0.003 in) more to drive pinion height adjusting washer than would be required if drive pinion were etched "0". By adding 0.08 mm (0.003 in), the mounting distance of drive pinion was decreased to 109.4 mm (4.309 in) which is just what m-8 (a-3) etching indicated.
- To change drive pinion adjustment, use different drive pinion height adjusting washers which come in different thickness.
- Use the following tables as a guide for selecting the correct drive pinion height adjusting washer thickness to add or subtract from the old drive pinion height adjusting washer.










1. Make sure all parts are clean and that drive pinion bearings are well lubricated.
2. Assemble drive pinion bearings into Tools.










3. Install drive pinion bearing inner race and drive pinion height adjusting washer to gear carrier using Tool as shown.
4. Turn the assembly several times to seat drive pinion bearings.





5. Measure the turning torque using Tool.