Transmission Parts Aisin AW TF-81SC TF-80SC Valve Body Valve / Sleeve

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:

Sonnax oversized secondary pressure regulator 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

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

Tooling:

F-39741-TL11
VB-FIX

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A worn secondary pressure regulator valve in a TF-80SC or TF-81SC transmission can result in compromised converter/lube circuit pressure resulting in overheated fluid, bushings and torque converter. Driveability issues include harsh Reverse, TCC slip and codes, and poor shift quality. The Sonnax oversized secondary pressure regulator valve kit 39741-11K is designed to correct the pressure outputs from the valve and restore hydraulic integrity of the SLT circuit.

Hardcoat anodized aluminum valve combats premature wear
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

Contents

Valve
Sleeve
Spring
Plug Use with TF-81SC Only

Valve Body Layout

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.