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Sonnax TCC Regulator Valve Kit

Sonnax TCC Regulator Valve Kit

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Sonnax TCC Regulator Valve Kit 77754-04K


Severe wear of the TCC regulator valve bore from the OE valve allows regulated converter
apply pressure to exhaust. This is a primary cause for a TCC-related 1870 slip code and
overheated converters. Exhausting apply pressure also diminishes line pressure, which results
in burnt clutches. Excessive wear at the isolator valve bore reduces TCC apply pressure.

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