Bore wear at the TCC control valve and/or sleeve results in the torque converter clutch remaining applied and transferring the shift shock. Loss of TCC control also results in RPM fluctuation.
The Sonnax oversized lockup control valve and boost assembly kit corrects circuit pressure loss and restores control of the TCC lockup circuit.
Bore wear at the TCC control valve and/or sleeve in Aisin AW TF-80/81SC and TF-60SN transmissions results in loss of torque converter clutch control. The TCC can remain applied, transferring shift shock, or loss of lockup controlcan result in RPM fluctuations. Sonnax lockup clutch control valve kit 15741-29K restores control of theTCC. Proper TCC control eliminates the shift shock and RPM fluctuations associated with a worn lockup control valve.
Vacuum testing fails to yield 18" of vacuum or higher on the lockup valve test location, or vacuum testing fails to yield 16" of vacuum or higher on the boost valve test location.
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