In GM Gen. 2 6T70/75/80 units, actuator feed limit valve bore wear results in low pressure at the shift and control solenoid valve assembly. The OE valve has a large reaction area and is highly affected by side-loading, which wears the valve body bore. As the bore wear increases, oil pressure is reduced to the shift solenoids, which causes solenoid and ratio codes. This also results in lower line pressure.
Reconditioning the bore and installing Sonnax oversized actuator feed limit valve kit 124740-48K will restore hydraulic control to the shift solenoids.

Hardcoat anodized aluminum valve combats premature wear
Oversized valve engineered to perform to OE specification

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