January 26, 2015
Required tool kit F-25741-TL is no longer in production. Check with distributor for availability.
Aisin AW TR-60SN and VW/Audi 09D transmissions may exhibit multiple line pressure-related problems due to excessive wear in the main pressure regulator bore. Wear at the inner bore results in excess pressure and reduced cooler/converter flow. Wear at the plug end allows oil loss resulting in poor line rise and burnt clutches. Installing the Sonnax oversized pressure regulator valve kit 25741-01K corrects pressure loss problems and restores proper pressure regulation. The oversized valve and calibrated spring match OE valve response, and the multi-position endplug allows you to match the original factory setting.
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.
A vacuum test at indicated ports fails to yield 18 in-hg or greater, or if visual wear is detected.