• Code 39, 740 & 1870
• Converter shudder
• Falls out of lockup when hot
• Overheated converter

Low converter apply pressure, caused by a worn regulator valve bore and insufficient isolator boost/PWM oil, or wear at the isolator bore.

The Sonnax redesigned isolator valve and TCC regulator sleeve and valve kit prevents excessive wear and restores these critical bores to their original operating clearances.

Additional Resources