Severe wear of the boost valve assembly allows TV and reverse boost oil leakage.
The closely toleranced replacement boost valve and sleeve restores hydraulic integrity and prevents oil leakage.
Toyota vehicles equipped with an A130, A131, and A140 transaxle may exhibit insufficient line rise in the drive ranges and excessively high pressures in reverse. This may be caused by extreme wear of the boost sleeve. Wear allows TV oil to exhaust through the manual valve in drive ranges, and reverse oil can enter the TV circuit forcing the pressure regulator valve into a high pressure position. The Sonnax boost valve and sleeve kits 89010-01K & 89010-02K will restore the hydraulic integrity of these circuits by preventing cross leakage.
Replaces Sonnax sleeve-only kits, 89010-01 and 89010-02.
Contact a Sonnax Parts Distributor.