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

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