Symptoms:

  • TCC codes
  • TCC slip
  • TCC surge
  • Loss of lube oil
  • Overheated fluid, bushings & converter
  • Poor shift quality
  • Harsh Reverse

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.

Correction:

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.

TF-80SC, TF-81SC

Secondary Pressure Regulator Valve Kit
Part No. 39741-11K


You need this if... View Instructions Find a Distributor
  • Sonnax valve is 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 provides over 80% more support than the OE casting.
  • A new spring is included to allow proper calibration.
  • Valve
  • Sleeve
  • Spring
  • Plug Use with TF-81SC Only

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

Aisin AW TF-80SC Valve Body Layout

Aisin AW TF-81SC Valve Body Layout

Aisin AW TF-81SC Valve Body Layout
  • TF-80SC, TF-81SC Secondary Pressure Regulator Valve Kit 39741-11K
  • TF-80SC, TF-81SC Secondary Pressure Regulator Valve Kit 39741-11K
  • TF-80SC, TF-81SC Secondary Pressure Regulator Valve Kit 39741-11K

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.

TF-80SC, TF-81SC Secondary Pressure Regulator Valve Kit Vacuum Test Locations