The OE actuator feed limit (AFL) valve routes regulated line pressure to the pressure control solenoid and the 1-2, 3-4 shift signal circuit in GM 4T65-E units. Wear at the AFL valve bore can cause low torque signal and/or low 1-2, 3-4 shift solenoid and shift signal circuit pressure, resulting in Code 1811, maximum adapt or long shift, TCC slippage and wrong gear starts. Bore wear also can cause poor EPC control, leading to high line pressure and TCC piston damage. Sonnax AFL valve kit 84596-02K restores hydraulic integrity to the AFL circuit.

Highly wear-resistant aluminum sleeve provides more support and durability to prevent wear
Hardcoat anodized aluminum valve combats premature wear
Annular grooves center the valve to prevent wear
Regulating pressure is reduced by about 10 psi to prevent high line pressure, which can lead to TCC piston damage

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