SonnaxValve Kit

Toyota/Lexus vehicles equipped with U341E and U341F units may have TCC apply and release concerns such as no lockup, slipping lockup or TCC stuck on. Improper lockup can result in harsh downshifts or engine stall at idle as well as associated trouble codes. On vehicles equipped with a lockup control valve train, bore wear allows control pressure to escape the circuit. Reconditioning the bore and installing Sonnax oversized lockup control valve kit 37740-08K renews TCC operation by restoring critical clearances and preventing pressure loss. Hardcoat anodized aluminum valves combat premature wear Annular grooves help center valve in bore to reduce future side-load wear

Valve Kit