Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
SYS.OK|MANUAL.DBβ LIVE
HOMESERVICE MANUALSCHEVROLET2007SILVERADO 1500 2WD V6-4.3LREPAIR AND DIAGNOSISTRANSMISSION AND DRIVETRAINAUTOMATIC TRANSMISSION/TRANSAXLESERVICE AND REPAIROVERHAULALLISON - AUTOMATIC TRANSMISSIONREMOVALTORQUE CONVERTER LEAK TEST
2007 Chevrolet Silverado 1500 2WD V6-4.3L
Torque Converter Leak Test
2007 Chevrolet Silverado 1500 2WD V6-4.3LSECTION Torque Converter Leak Test
Torque Converter Leak Test
Tools Required
* J 43763 Torque Converter Leak Test Plug
* J 21369-F Torque Converter Leak Test Fixture
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.
3. Install J 43763 into the torque converter hub.
4. Install J 21369-F (3) onto the torque converter (8) and onto J 43763 (4).
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). Connect an air hose to the air fitting (1) of J 43763.
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.
11. Remove the J tools from the torque converter.
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.