Front Differential Transfer Drive Gear Assembly Installation

Tools Required: 

J 45053  Universal Clamp Press. See Special Tools .

Fig 1: View Of Front Differential Transfer Drive Gear Assembly
Courtesy of GENERAL MOTORS CORP.
1. Inspect the front differential transfer drive gear assembly rear bearing assembly, located in the transmission case cover assembly, before installing the front differential transfer drive gear assembly (14) to be sure that all roller bearings are in the correct position.
IMPORTANT: When the front differential transfer drive gear assembly (14) is installed correctly, the front differential transfer drive gear assembly and the output gear will mesh evenly. If not, the front differential transfer drive gear assembly did not clear all 4-5 clutch plates in the 4-5 clutch assembly or is not seated into the front differential transfer drive gear assembly rear bearing assembly, located in the transmission case cover assembly.
2. Using J 45053  install the front differential transfer drive gear assembly (14) to the transmission case assembly. See Special Tools .
Fig 2: View Of Front Differential Transfer Drive Gear Assembly & Thrust Assembly
Courtesy of GENERAL MOTORS CORP.
IMPORTANT: The front differential transfer drive gear thrust washer (264) is available as a select fit washer. Depending on production date of the transmission the thrust washer may have a letter marking for identifying the thickness.
3. Install the front differential transfer drive gear thrust bearing washer (264) onto the front differential transfer drive gear assembly (14).
4. Install the front differential transfer drive gear thrust bearing assembly (263) onto the front differential transfer drive gear thrust bearing washer (264).
Fig 3: Measuring Between Straight Edge & Case
Courtesy of GENERAL MOTORS CORP.
5. Place a straight edge on the top of the rollers on the thrust bearing to reach across to the case surface.
6. Using a feeler gage, measure between the straight edge and the case.

   Specification:  1.269-1.645 mm (0.050-0.065 in)

7. If the measurement is not within specifications, refer to Shim Size Specifications  to select the correct thickness thrust washer.
Fig 4: View Of 1-2 Reverse Internal Gear & Shim
Courtesy of GENERAL MOTORS CORP.
8. If the measurement is not obtainable, using the thickest washer, the 1-2 reverse internal gear (594) will require removal and then a thicker shim (596) installed. Refer to 1-2 Reverse Carrier Gear Assembly Installation .
9. Refer to Shim Size Specifications  to select the correct thickness of shim to obtain the correct measurement.
Fig 5: View Of Front Differential Transfer Drive Gear Assembly
Courtesy of GENERAL MOTORS CORP.
10. Install again the front differential drive gear (14), the thrust washer and the thrust bearing.
Fig 6: Measuring Between Straight Edge & Case
Courtesy of GENERAL MOTORS CORP.
11. Measure the thrust bearing height again to make sure it is in the specifications. If not within the specifications, adjust the height by changing the thrust washer.