Input Shaft: Adjustments

NOTE: Whenever the transaxle is disassembled, the bearing preload must be adjusted. The input shaft preload can be adjusted by selecting shims to insert between the fourth gear end bearing cups and the transaxle case. To determine the correct thickness shim, use Shim Selection Sets T88C-77000-JF and T88C-77000-C, along with the following procedure:

1. Install the input shaft third gear end bearing cup into the flywheel housing.
2. Inspect the bearing cups after installation to make sure they are fully seated.
3. Install the input shaft assembly into the flywheel housing.
4. Place the fourth gear end bearing cup on the input shaft bearing.
5. Position Shim Selection Gauge T88C-77000-CH3 (part of T88C-77000-C) on top of the input shaft assembly.





6. Place six collars (part of T88C-77000-JF) on the flywheel housing at the positions shown.
7. Place the transaxle case on the collars and install the washers and bolts (part of T88C-77000-JF). Tighten the collar bolts to 38-51 Nm (28-38 ft. lbs.).





8. Mount Dial Indicator with Bracketry T50T-4201-C or equivalent to check the end play of the input shaft.
9. Rotate the input shaft assembly several times to help seat the bearings.
10. Adjust the dial indicator to zero at the lowest point on the end of the input shaft.

NOTE: Do not disturb the dial indicator until at least three end play readings have been taken.





11. Raise the input shaft assembly by hand and read the end play. Lower the input shaft assembly.

CAUTION: The input shaft assembly must be lifted equally on both sides or it will tend to cock to one side, resulting in an incorrect reading.

12. Turn the input shaft assembly several times until the dial indicator returns to zero. Raise the input shaft assembly by hand to take a second end play measurement.
13. Repeat Step 12 to obtain at least three readings within 0.10 mm (0.004 inch) of each other. Average at least three of the measurements to obtain an end play reading. Subtract 0.70 mm (0.028 inch) from the end play reading to account for the thickness of the wave spring which fits between the shim and the cup. This result is the final shim size. See the example below.
a. Discard the first reading in this example since it is more than 0.004 inch larger than the next closest reading.
First reading: 0.053 inch
Second reading: 0.047 inch
Third reading: 0.046 inch
Fourth reading: 0.045 inch
b. Average the second, third, and fourth readings.
0.047 + 0.046 + 0.045 = 0.138
0.138/3 = 0.046
c. Subtract 0.028 inch from the average reading.
0.046-0.028 = 0.018
d. The final shim size is 0.018 inch.
14. From Shim Kit E92Z-7L172-A or equivalent, select the shim(s) that is closest (or slightly thinner) to the final shim size determined in Step 13.

NOTE: Do not use more than two shims.

15. Remove the bolts and washers securing the transaxle case to the flywheel housing. Remove the transaxle case, gauge, fourth gear end bearing cup and input shaft assembly. Do not remove the bearing cups in the flywheel housing.