Aisin AW TR-60SN and VW/Audi 09D transmissions may exhibit flare upshifts and/or downshifts due to wear in the K2 clutch control bore. Release and apply timing issues and pressure control out of range codes are not uncommon to this unit as well. Wear in the B1 brake control circuit may cause harsh downshifts and/or flare upshifts. Drivability issues also may occur with the change of the vehicle operating temperatures. The Sonnax K2 clutch/B1 brake control valve kit 25741-05K re-establishes accurate clutch or brake control oil pressure and eliminates shift complaints associated with either circuit. With the improved materials and valve support, service life can be extended beyond that of the OE casting.
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.
Vacuum testing at the port(s) indicated fails to hold the recommended minimum in-Hg, or if wear is visually detected.