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  • Gear ratio & solenoid codes
  • No shift
  • Various shift concerns


Bore wear prevents proper valve stroke and reduces critical clutch/brake feed/apply oil flow through the various relay/control/switch valves.


Restore proper clutch/brake feed and apply control by reaming bore to match the improved Sonnax oversized valve.

09G, 09K, 09M, 6F21WA, TF-60SN, TF-80SC, TF-81SC

Oversized Three-Spool Relay/Control/Switch Valve Kit
Part No. 15741-50K

This kit can be used in any of six locations in three different valve body applications. See instructions for details.

You need this if... View Instructions

The listed Aisin AW, VW/Audi and Mini transmissions each utilize three spool valves as relay, control or switch valves. These valves are found in multiple circuits in all valve bodies across this family of units (see Figures 1-4) and are used to route critical clutch/brake feed and apply oil to the appropriate apply components. The numerous shift/drivability complaints vary depending on the circuit affected. Sonnax oversized three-spool relay/control/switch valve kit 15741-50K restores proper clutch/brake feed and apply pressure to the related components by functioning in a refurbished bore that provides correct hydraulic clearances.

  • Fits any of six locations in listed applications
  • Valve is hardcoat anodized to reduce wear
  • Annular grooves improve lubrication and valve centering
  • Valve
  • End Plug

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-80SC Valve Body Layout

Tf 80sc vbl thumb

Aisin AW TF-81SC Valve Body Layout

Tf 81sc vbl thumb

Aisin AW TF-60SN Valve Body Layout

Tf 60sn vbl thumb

October 16, 2014

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

Read Now

September 30, 2005

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

Gregg Nader

Topics: Diagnostics And Theory Transmission

Read Now
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  • 15741 50k in chart

You need this if...

Vacuum testing at the port(s) indicated fails to hold the recommended minimum in-Hg, or if wear is visually detected.
NOTE: The vacuum test for the B1/C3 Relay Port in TF-81SC application is an example of a typical port location. All the other valves should be checked similarly at the port associated with the plug-to-valve spool interface.

  • 15741 50k test