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  • Bushing failure
  • Overheated fluid & TCC lining
  • High line pressure in Reverse
  • Low line rise in Drive
  • Low line rise in Reverse


Wear at the inner bore results in excess pressure and reduced cooler/converter flow. Boost sleeve wear allows oil loss, resulting in poor line rise.


This oversized pressure regulator valve and boost assembly allows the valve body bore to be restored to normal operating condition.

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

Oversized Pressure Regulator Valve & Boost Valve Kit
Part No. 15741-01K

You need this if... View Instructions
  • Pressure Regulator Valve
  • Pressure Regulator Spring
  • Boost Sleeve
  • Boost Valve

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

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  • 15741 01k combo
  • 15741 01k  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 01k