Continuous oscillation of the pressure regulator valve causes bore wear, which results in line pressure deviation and valve instability. Reverse boost sleeve wear allows reverse pressure and SLT oil leakage.
Recover hydraulic control and renew performance by reconditioning the bore and installing the Sonnax oversized primary pressure regulator and reverse boost valve kit.
Toyota/Lexus vehicles equipped with U660E/F, U760E/F units commonly exhibit a number of symptoms related to line pressure instability. A few of these concerns are poor line rise and clutch/brake slippage, higher than normal pressures in reverse, erratic shifts and low converter feed pressure. These issues can frequently be traced to excess wear in the primary pressure regulator valve bore. To address these problems and restore full hydraulic control, Sonnax offers oversized primary pressure regulator and reverse boost valve kit 47740-02K.
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.
December 09, 2013
Topics: Identification Guides Transmission Toyota/Lexus U760F Transmission U660F Transmission U760E Transmission U660E TransmissionRead Now
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Vacuum tests at the ports indicated fail to hold at least 18 in-Hg.