Tool Required VB-FIX Required

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Symptoms:
  • Harsh Reverse
  • Overheated fluid, bushings & converter
  • Poor shift quality
  • TCC slip
  • TCC surge
Cause:

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. Boost sleeve wear results in converter pressure bleeding into and elevating EPC.

Correction:

The Sonnax valve and boost assembly corrects circuit pressure loss and restores control over the secondary pressure regulator valve and boost valve function.

Tool Required VB-FIX Required

09D, TR-60SN

Secondary Pressure Regulator Valve Kit

Part No.

25741-11K

Secondary Pressure Regulator Valve Kit
  • 25741-11k_combo

  • Secondary Pressure Regulator Valve Kit

Small_25741-11k_combo Small_25741-11k__1_

09D, TR-60SN

Secondary Pressure Regulator Valve Kit

Part No. 25741-11K

  • Secondary Pressure Regulator Valve
  • Boost Valve
  • Boost Sleeve

Complaint:

  • Harsh Reverse
  • Overheated fluid, bushings & converter
  • Poor shift quality
  • TCC slip
  • TCC surge

Cause:

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. Boost sleeve wear results in converter pressure bleeding into and elevating EPC.


Correction:

The Sonnax valve and boost assembly corrects circuit pressure loss and restores control over the secondary pressure regulator valve and boost valve function.

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

Required Tools

Related Parts

You need this if...

A vacuum test fails to yield the indicated 16 or 18 in-hg or greater, depending on the port tested as shown, or if visual wear is detected.

  • Test Locations

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Valve Body Layouts

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.

Valve Body Layout Aisin AW TR-60SN

Related Tech Articles

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