Restore proper hydraulic control and renew line pressure performance in Aisin Seiki AS66RC, AS69RC transmissions by replacing worn OE parts with Sonnax drop-in K1 apply boost valve kit #122740-29K and lockup boost valve kit #122740-30K. Sleeves in both kits are manufactured from highly wear-resistant aluminum. Drop-in Zip Valve™ parts install quickly and easily.
New Sonnax Boost Valve Kits
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