Front End Play Check

Tools Required

• J 8001  Dial Indicator Set
• J 25025-B  Guide Pin Set
• J 28585  Snap Ring Remover. See Special Tools .

Fig 1: Measuring Front End Play
Courtesy of GENERAL MOTORS CORP.
1. Assemble the J 25025-B  by attaching the threaded rod and the dial indicator holder to one of the bolt holes on the transmission case assembly (7).
2. Assemble the J 8001-3  onto the dial indicator holder. Index the J 8001-3  to the end of the turbine shaft (502).
3. Eliminate any slack by pressing down on the turbine shaft (502).
4. Using the J 28585  , apply upward pressure on the output carrier assembly to remove free play in the retainer ring. See Special Tools .
5. Set the J 8001-3  to 0.
6. Pull up on the turbine shaft (502) while holding up the output carrier assembly with the J 28585  . See Special Tools . The correct end play is between 0.102-0.559 mm (0.004-0.022 in).
IMPORTANT: During reassembly, the front end play check must be repeated in order to verify the accuracy of the selective washer.
7. Record this measurement for future reference.
8. Remove the tools.

Tools Required

• J 8001  Dial Indicator Set
• J 25025-B  Dial Indicator Post and Guide Pin Set
• J 28585  Snap Ring Remover. See Special Tools .

Fig 1: Measuring Front End Play
Courtesy of GENERAL MOTORS CORP.
NOTE: If the front end play check procedures are not closely followed, you may select an incorrect selective thrust washer thickness. This could result in severe damage to the internal transmission components.
1. Assemble the J 25025-B  by attaching the threaded rod and the dial indicator holder to one of the bolt holes on the transmission case assembly (7).
2. Assemble the J 8001-3  onto the dial indicator holder. Index the J 8001-3  to the end of the turbine shaft (502).
3. Eliminate any slack by pressing down on the turbine shaft (502).
4. Using J 28585  , apply upward pressure on the output carrier assembly to remove free play in the retainer ring. See Special Tools .
5. Set the J 8001-3  to 0.
6. Pull up on the turbine shaft (502) while holding up the output carrier assembly with the J 28585  . See Special Tools .

   End Play Specification:  The correct end play is 0.102-0.559 mm (0.004-0.022 in).

7. Remove the tools from the transmission.
8. If the front end play measurement is incorrect, refer to the Overrun Clutch Housing Selective Thrust Washer Specifications . Choose a new selective thrust washer based on the original selective washer and the information contained in the table.
9. Correct the end play by changing the overrun clutch housing selective thrust washer.