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  • Overheated fluid, bushings & converter
  • High SLT pressure
  • Low SLT pressure
  • Poor shift quality
  • Harsh Reverse
  • TCC slip
  • TCC surge


Bore wear at the spring end of the valve allows the SLT circuit and regulated converter pressure to cross leak. Bore wear at the balance end of the valve reduces converter and lube flow.


The Sonnax replacement sleeve and valve kit allows the hydraulic integrity of the bore to be restored after reaming. With the improved materials and valve support, the service life can be extended beyond the OE casting.

09G, 09K, 09M, 6F21WA, TF-60SN

Secondary Pressure Regulator Valve Kit
Part No. 15741-11K

You need this if... View Instructions

A worn secondary pressure regulator valve in vehicles with listed Aisin AW, VW/Audi, and Mini transmissions 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, TCC slip, and poor shift quality. Sonnax kit 15741-11K is designed to correct the pressure outputs from the secondary pressure regulator valve and fix these drivability issues.

  • Hard-coat anodized aluminum to provide wear resistance.
  • Annular grooves have been added to the valve for better centering in the bore.
  • The highly wear-resistant Sonnax sleeves provide over 80% more support than the OE casting.
  • A new spring is included to allow proper calibration.
  • Inner Sleeve
  • Outer Sleeve
  • Valve
  • Spring
  • Retainer

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.

Aisin AW TF-60SN Valve Body Layout

Tf 60sn vbl thumb

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Aisin AW TF-60SN, BMW 6F21WA, VW/Audi 09G, 09K, 09M Vacuum Test Guide

Topics: Vacuum Test Guides Vacuum Testing Transmission BMW VW/Audi Aisin AW 6F21WA Transmission 09G, 09K, 09M Transmission TF-60SN Transmission

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Anatomy of a Transmission: Oil Flow in the Pump-PR-Converter-Cooler Lube Circuits

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Topics: Diagnostics And Theory Transmission

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  • 15741 11k combo
  • 15741 11k  1

You need this if...

Either a Wet Air Test or a Vacuum Test in the location shown, result in leakage. Vacuum test must hold a minimum of 18.

  • 15741 11k