In Aisin AW 55-50SN and 55-51SN units, the original equipment lockup control valve sleeve is prone to significant wear due to constant oscillation of the plunger valve, resulting a multitude of converter complaints. Converter feed pressure from the secondary pressure regulator valve is directed in part to this plunger valve assembly and becomes converter apply pressure. The plunger valve aids in correctly positioning the inboard lock up control valve to regulate converter apply. If this sleeve is worn, converter apply pressure is reduced and the converter may not fully apply. Sonnax lockup control valve kit 59947-03K restores proper hydraulic clearances and prevents valuable converter apply pressure loss.

Sleeve is manufactured from highly wear-resistant billet aluminum
Hardcoat anodized aluminum valve combats premature wear
Drop-in Zip Valve™ parts install quickly and easily

Learn More About Zip Valve™ Drop-In Repairs

More From This Category

Sonnax Oversized Lockup Relay Valve Kit, Aisin Aw, Aw55-50Sn, Aw55-51Sn, Each

Sonnax Oversized Lockup Relay Valve Kit, Aisin Aw, Aw55-50Sn, Aw55-51Sn, Each

$106.67

MANLEY Valve, Pro Flo, Intake, 2.055 in. Head Dia, 0.3415 in. Stem Dia, 5.111 in. Length, SBC, Set of 8

MANLEY Valve, Pro Flo, Intake, 2.055 in. Head Dia, 0.3415 in. Stem Dia, 5.111 in. Length, SBC, Set of 8

$607.34

MANLEY Valve, Titanium, Intake, Bead Loc, 2.15 in. Head Dia, 0.3415 in. Stem Dia, 5.34 in. Length, Each

MANLEY Valve, Titanium, Intake, Bead Loc, 2.15 in. Head Dia, 0.3415 in. Stem Dia, 5.34 in. Length, Each

$302.72

MANLEY Valve, Race Master, Exhaust, 1.94 in. Head Dia, 0.3415 in. Stem Dia, 5.522 in. Length, BBC, Set of 8

MANLEY Valve, Race Master, Exhaust, 1.94 in. Head Dia, 0.3415 in. Stem Dia, 5.522 in. Length, BBC, Set of 8

$380.66

MANLEY Valve, Race Master, Intake, 37mm Head Dia, 0.2355 in. Stem Dia, 4.722 Length, For Ford 5.0L, Set of 8

MANLEY Valve, Race Master, Intake, 37mm Head Dia, 0.2355 in. Stem Dia, 4.722 Length, For Ford 5.0L, Set of 8

$408.60

MANLEY Valve, Budget Replacement, Intake, 2.02 in. Head Dia, 0.3415 in. Stem Dia, 4.88 in. Length, SBC, Each

MANLEY Valve, Budget Replacement, Intake, 2.02 in. Head Dia, 0.3415 in. Stem Dia, 4.88 in. Length, SBC, Each

$18.76