Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

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Torque Converter Clutch: Testing and Inspection

1. Connect vacuum gauge in line between GVWR valve output and operated device and connect suitable vacuum pump to GVWR input port.
2. Apply 22 inches Hg vacuum to valve while observing gauge. Output vacuum should be approximately 20.7 inches Hg within 1.7 seconds.
3. Reduce vacuum at input side of valve to 0.9 inches Hg while observing gauge. Output vacuum should equalize within 0.5 second.
4. If valve fails to perform as outlined, replace valve.