January 26, 2015
Vehicles equipped with Aisin AW TR-60SN and and VW/Audi 09D transmissions may experience slippage in 4th, 5th or 6th Gear during steady driving. They also can experience slippage or shock on kickdown. These problems are caused by excess wear in the solenoid modulator valves, which results in improper solenoid pressures. Replacing the worn solenoid modulator valve or valves with Sonnax solenoid modulator valve kit 25741-18K will ensure the solenoids are fed the proper pressures, and will eliminate excess slippage and shock on kickdown.
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.