The noted Toyota transmissions may exhibit poor shift quality due to wear in the clutch apply control plunger sleeve. As the OE steel plunger valve oscillates in the cast aluminum bore, wear occurs. This prevents proper control of the inboard clutch apply control valve, resulting in problems with sequencing of clutch apply and release, which may cause flares and binds on up or downshifts. Ultimately this can lead to clutch failure. Sonnax clutch apply control plunger valve kit 57917E-05K restores proper hydraulic clearances to ensure correct sequencing of clutch apply and release. Improved wear-resistant materials are used to provide durability and prevent future wear.

• Ssleeve is manufactured from highly wear-resistant billet aluminum
• Hardcoat anodized aluminum valve combats premature wear
• Annular grooves have been added to the valve to prevent sideloading related wear