A worn secondary pressure regulator valve in vehicles with an Aisin AW TR-60SN, VW/Audi 09D transmission can cause several problems. Overheating the fluid, bushings, and torque converter can all be caused by a worn secondary pressure regulator valve. Drivability issues include harsh reverse engagement, TCC slip resulting in RPM surge, and poor shift quality. Sonnax kit 25741-11K is designed to correct the pressure outputs from the secondary pressure regulator valve and fix these drivability issues.

• The hard-coat anodized aluminum valves are wear-resistant for extended life
• The boost valve sleeve is highly wear-resistant to increase life
• Annular grooves have been added to the secondary pressure regulator valve to better center the valve in the bore
• The secondary pressure regulator valve has additional spool length to increase valve support