Part 2
Bearing Preload Adjustment (Continued)Differential Preload Adjustment
1. Assemble a new shim of the same thickness as the removed shim.
CAUTION: Preload cannot be measured accurately if the shim is reused. An used shim is deformed by the pressure applied during assembly.
2. Assemble the bearing outer race to the transaxle case using the SSTs.
3. Assemble the bearing outer race to the clutch housing using the SSTs.
4. Assemble the SST to the clutch housing.
Bolt A
Part No.: 99450 1055 or M10x1.25 length 55 mm {2.2 in}, and nut (M10x1.25)
Bolt A tightening torque
38-52 N.m {3.9-5.3 kgf.m, 29-38 ft.lbf}
Bolt B
SST (49 G019 033 part of 49 G019 0A0)
Bolt B tightening torque
88-118 N.m {9.0-12 kgf.m, 65-87 ft.lbf}
Bolt C
Part No.: 9YA02 1080 or M10x1.5 length 55 mm {2.2 in}
Bolt C tightening torque
38-52 N.m {3.9-5.3 kgf.m, 29-38 ft.lbf}
Bolt D
Part No.: 99450 1030 or M10x1.25 length 30 mm {2.2 in}
Bolt D tightening torque
38-52 N.m {3.9-5.3 kgf.m, 29-38 ft.lbf}
5. Apply transaxle oil to the roller area of the taper roller bearing on the differential.
6. Assemble the differential to the clutch housing.
7. Assemble the transaxle case to the clutch housing.
8. Set the SST so that its end engages the pinion shaft of the differential.
9. Rotate the differential ten times using the SST to engage the taper roller bearing and the bearing outer race smoothly.
10. Measure the differential preload.
Standard preload
0.7-1.7 N.m {7.2-17 kgf.cm, 6.2-15 ft.lbf}
- If the measured preload is within the specification, the shim thickness is the same as the removed one and there is no problem, therefore the "Differential Preload Adjustment" procedure is finished.
- If not within the specification, perform "Shim selection calculation". (See Shim selection calculation.)
Shim selection calculation
1. Calculate the preload gap by subtracting the measured preload value from constant number A.
- Constant number A = 1.2 N.m {12 kgf.cm, 11 in.lbf}
- 1.2 N.m {12 kgf.cm, 11 in.lbf} - measured preload value = preload gap
Calculation example
- Measured preload value = 2.5 N.m {25 kgf.cm, 22 in.lbf}
- 1.2 N.m {12 kgf.cm, 11 in.lbf} - 2.5 N.m {25 kgf.cm, 22 in.lbf} = -1.3 N.m {13 kgf.cm, 12 in.lbf}
2. Calculate the shim thickness gap by multiplying the preload gap by constant number B.
- Constant number B = 0.083 mm/N.m {0.008 mm/kgf.cm, 0.0004 in/in.lbf}
- Preload gap x 0.083 mm/N.m {0.008 mm/kgf.cm, 0.0004 in/in.lbf} = shim thickness gap
Calculation example
- Preload gap = -1.3 N.m {-13 kgf.cm, -12 in.lbf}
- -1.3 N.m {-13 kgf.cm, -12 in.lbf} x 0.083 mm/N.m {0.008 mm/kgf.cm, 0.0004 in/in.lbf} = -0.108 mm {-0.00425 in}
3. Calculate the shim thickness calculated value by adding the shim thickness gap to the thickness of the shim used in the measurement.
- Shim thickness gap + thickness of shim used in measurement = shim thickness calculated value
Calculation example
- Shim thickness gap = -0.108 mm {-0.00425 in}
- Thickness of shim used in measurement = 0.9000 mm {0.03543 in}
- -0.108 mm {-0.00425 in} + 0.9000 mm {0.03543 in} = 0.792 mm {0.0312 in}
4. Based on the shim thickness calculated value, select a shim of the appropriate thickness.
Selection example
- Because shim thickness calculated value 0.792 mm {0.0312 in} applies to 0.775 mm {0.0305 in} or more and less than 0.825 mm {0.0325 in}, a shim of 0.800 mm {0.0315 in} thickness is selected.
NOTE:
- The preload gap is the difference between the central value of the standard preload value and the measured preload value.
- Constant number A, 1.2 N.m {12 kgf.cm, 11 in.lbf} is the central value of the standard preload value.
- The shim thickness gap is the difference between the thickness of the removed shim and the thickness of an appropriate shim. In the formula to calculate the shim thickness gap, the shim thickness gap is calculated by multiplying the preload gap with constant number B.
- Constant number B is the shim thickness which varies each time the preload changes by 1.0 N.m {10 kgf.cm, 8.9 in.lbf}. Because the shim thickness changes 0.1 mm {0.004 in} when the preload changes 1.2 N.m {12 kgf.cm, 11 in.lbf}, the quotient is 0.083 mm/N.m {0.008 mm/kgf.cm 0.0004 in/in.lbf}.