Final Drive

PRE-INSPECTION
-RS5F70A & RS5F70V (Differential case side)-
- Check the clearance between side gear and differential case as follows using Tool.





1. Clean final drive assembly sufficiently to prevent side gear thrust washer, differential case, side gear, and other parts from sticking by gear oil.
2. Upright the differential case so that the side gear to be measured faces upward.





3. Place final drive adapter and dial gauge onto side gear. Move side gear up and down, and measure the clearance using Tool.
Clearance between side gear and differential case: 0.1 - 0.2 mm (0.004 - 0.008 inch)
4. If not within specification, adjust the clearance by changing thrust washer thickness.
5. Turn differential case upside down, and measure the clearance between side gear and differential case on the other side in the same way using Tool.

DISASSEMBLY





1. Remove mounting bolts. Then, separate the final gear from differential case.
2. Make a notch and remove speedometer drive gear using a scraper or other suitable tool.
- Bearing replacer cannot be positioned unless speedometer drive gear is removed.








3. Remove differential side bearing of final gear side using Tool.
4. Turn differential case upside down, and remove differential side bearing of speedometer drive gear side using Tool.
- Be careful not to mix up the differential side bearings - RS5F70A.
5. Remove speedometer stopper.





6. Remove viscous coupling - RS5F70V.





7. Remove lock pins from pinion mate shaft using Tool.





8. Remove pinion mate shaft.
9. Rotate pinion mate gear, and remove pinion mate gear, pinion mate thrust washer, side gear, and side gear thrust washer from differential case.

INSPECTION





Gear, Washer, Shaft and Case
- Check mating surfaces of differential case, side gears and pinion mate gears - RS5F70A and RS5F70V.
- Check viscous coupling - RS5F70V.
- Check washers for wear.





Viscous Coupling - RS5F70V
- Check case for cracks.
- Check silicone oil for leakage.





Bearing
- Make sure bearings roll freely and are free from noise, cracks, pitting or wear.
- When replacing tapered roller bearing, replace outer and inner race as a set.

ASSEMBLY
- RS5F70A & RS5F70V -





1. Apply gear oil to sliding area of differential case, each gear, and thrust washer.
2. Install side gear thrust washer and side gear into differential case.
3. Position pinion mate gear and pinion mate thrust washer diagonally, and install them into differential case while rotating.





4. Insert pinion mate shaft into differential case.

- RS5F70A & RS5F70V (Differential case side) -
1. Upright the differential case so that its side gear to be measured faces upward.





2. Place preload adapter and dial gauge onto side gear. Move side gear up and down, and measure the clearance using Tool.
3. Turn differential case upside down, and measure the clearance between side gear and differential case on the other side in the same way using Tool.
Clearance of side gear and differential case:
0.1 - 0.2 mm (0.004 - 0.008 inch)
Differential side gear thrust washers:
Refer to Application and ID.

- RS5F70V (Viscous coupling side) -
1. Measure clearance between side gear and viscous coupling with washers with a suitable tool following the procedure below.





a. Set remaining side gear with washer on pinion mate gears.
b. Measure distance "X".
- Measure in at least 4 places around the edge of the side gear and take an average. At least 4 measurements are needed because the side gear may be uneven.
c. Measure dimension "Y". Clearance between side gear and viscous coupling with washers can be obtained by "X + Y - 2A".
Clearance between side gear and viscous coupling: 0.1 - 0.2 mm (0.004 - 0.008 inch)





d. If not within specification, adjust clearance by changing thickness of side gear thrust washer.
Differential side gear thrust washers: Refer to Application and ID.

- RS5F70A & RS5F70V -





1. Install retaining pin using Tool.
- Make sure that retaining pin is flush with case.





2. Install viscous coupling - RS5F70V.





3. Align and install speedometer drive gear into differential case.
4. Install speedometer stopper.





5. Install differential side bearing using Tool.
6. Turn differential case upside down, and install another differential side bearing on the other side in the same way using Tool.





7. Install differential gear into differential case. Apply sealant onto mounting bolts, and tighten them in order as shown in the figure with specified torque.
Tightening torque: Refer to Major Overhaul. Major Overhaul