Torque Converter Leak Test

Tools Required

• J 43763  Torque Converter Leak Test Plug. See Special Tools .
• J 21369-F  Torque Converter Leak Test Fixture. See Special Tools .

Fig 1: Test Equipment To Check Torque Converter For Leaks
Courtesy of GENERAL MOTORS CORP.
IMPORTANT: The torque converter leak test requires a large container of water in order to submerge the torque converter.
1. Position the torque converter (6) on the work table so that the pump hub is facing up.
2. Move the nut (3) to the middle of the center body (1) of J 43763  . See Special Tools .
3. Install J 43763  into the torque converter hub. See Special Tools .
Fig 2: Using Compressed Air To Leak Test Converter
Courtesy of GENERAL MOTORS CORP.
4. Install J 21369-F  (3) onto the torque converter (8) and onto J 43763  (4). See Special Tools .
5. Firmly tighten the nut (6) in order to seal J 43763 into the torque converter.
6. Firmly tighten the nut (5) in order to securely attach the torque converter to J 21369-F  (3). See Special Tools . Connect an air hose to the air fitting (1) of J 43763  . See Special Tools .
7. Pressurize the converter to 517 kPa (75 psi) maximum.
8. Disconnect the air hose. Submerge the torque converter in water.
9. Closely observe the torque converter for bubbles that indicate leakage. If the torque converter leaks, replace the torque converter.
CAUTION: All pressure from the torque converter must be exhausted before loosening the test fixture nut. Failure to relieve the pressure could cause personal injury and/or property damage.
10. Push on the pressure relief valve (2) of J 43763  and release the air from the torque converter. See Special Tools .
11. Remove the J tools from the torque converter.