Apply Control Plunger Valve Kit Archives - Transmission Digest
Toyota/Lexus Oversized B1 Apply Control Valve Kit

Vehicles with Toyota/Lexus U660E and U660F transmissions may exhibit 2nd and 6th Gear shift complaints and burnt B1 clutches. This can be caused by wear at the valve and/or boost valve and sleeve, which leads to improper valve function. Reconditioning the bore and installing the Sonnax oversized B1 apply control valve kit 47740-57K will restore

Sonnax Aisin Seiki B1/B2 Apply Control Plunger Valve Kit

Bore wear in the B1/B2 apply control plunger valve sleeve in AS66RC and AS69RC transmissions allow line pressure to leak to exhaust at the B1 apply valve bore or line pressure and Reverse pressure to cross leak at the B2 apply valve bore. The result is inappropriate to apply pressure at the B1 and B2