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Description
Enhanced Durability: The new oversize S4 regulator valve for GM 8L45 and 8L90 transmissions addresses significant wear issues at the S4 regulator valve position.
Improved Performance: Corrects slip and harsh shifting symptoms, ensuring smoother 1-2 or 1-3 shifts and reducing coast downshift clunks for a more refined driving experience.
Redesigned and lengthened valve lands to ride in unworn portions of the bore, restoring hydraulic integrity of the circuit.