Ford CFT30 transmissions often exhibit TCC apply and release concerns, overheated fluid, poor cooler and lube flow, fuel economy drop, and/or TCC codes. These symptoms may be caused by excess wear of the TCC regulator valve bore, which allows crucial control pressure to escape the circuit. Reconditioning the bore and installing Sonnax oversized TCC regulator valve kit 33740-03K restores critical clearances for renewed TCC/cooler/lube operation.
Sonnax valve body layouts provide a detailed overview of individual units making it quick and easy to determine what’s available for the specific valve body you’re working on. See all Sonnax valve body layouts.
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Vacuum testing at the port(s) indicated fails to hold the recommended minimum in-Hg, or if wear is visually detected.