M/T Differential Carrier Bearing Preload Adjustment
M/T Differential Carrier Bearing Preload Adjustment
Special Tools Required
- Preload Inspection Tool 070AJ-0020101
If any of the items listed below were replaced, the carrier bearing preload must be adjusted.
- Transmission housing
- Clutch housing
- Differential carrier
- Spacer
- Carrier bearing and outer race
1. Disassemble the transmission Manual Transmission Disassembly.
2. Install the 81 mm shim, the spacer, and the bearing outer race into the transmission housing, and install the spacer and the bearing outer race into the clutch housing, if they are removed M/T Differential Carrier Bearing Outer Race Replacement.
NOTE:
- The tapered roller bearing and the bearing outer race compose the carrier bearing are always should be a set. Do not combine the other one.
- Note the thickness size of the used 81 mm shim.
3. Install the differential carrier with the tapered roller bearing, and assemble the transmission housing and the clutch housing using the 10 mm flange bolts by specified tightening torque.
NOTE: It is not necessary to use sealing agent between the housings for this adjustment.
4. Rotate the differential assembly in both directions to seat the carrier bearings.
5. At normal room temperature, measure the starting torque of the differential assembly by rotating it in both directions using the preload inspection tool (A) and a torque wrench (B).
6. If the carrier bearing preload is not within the standard, select an 81 mm shim that will provide the correct preload:
- Compare the bearing preload you got on the first try with the standard preload of 3.43-4.51 Nm (35-46 kgf-cm, 30-40 lbf-in).
- If the preload you measure was less than standard, subtract it from the standard preload.
- If the preload you measure was more than standard, subtract the standard preload from the preload you measure.
7. Subtract the appropriate thrust shim thickness from the middle of the standard preload: 4.0 Nm (41 kgf-cm, 36 lbf-in).
NOTE:
- Each shim size up or down from standard makes about 0.3-0.4 Nm (3-4 kgf-cm, 2.6-3.5 lbf-in) difference in preload.
- Assemble only one 81 mm shim. Do not install two or more 81 mm shim combined.
Example 1 (measured preload was less than the standard):
Measured preload: 2.1 Nm (21 kgf-cm, 18 lbf-in) with a 2.50 mm (0.098 in) thrust shim:
The subtracted preload was 1.9 Nm (20 kgf-cm, 18 lbf-in) less than the standard, so you need a shim five sizes thicker than in measured (try the 2.65 mm (0.104 in) 81 mm shim, and recheck).
Example 2 (measured preload was more than the standard):
Measured preload: 4.8 Nm (49 kgf-cm, 43 lbf-in) with a 2.50 mm (0.098 in) thrust shim:
The subtracted preload was 0.8 Nm (8 kgf-cm, 7 lbf-in) more than the standard, so you need a shim two sizes thinner than in measured (try the 2.44 mm (0.096 in) 81 mm shim, and recheck).
81 mm Shim
8. Replace the 81 mm shim to appropriate one M/T Differential Carrier Bearing Outer Race Replacement.
9. With the appropriate size 81 mm shim installed in the transmission housing, check the initial preload again to verify the preload is within the standard.
10. Reassemble the transmission Manual Transmission Reassembly.