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

MANLEY Valve, Custom, Titanium, .3415 in. Stem Dia, Set of 8

MANLEY Valve, Custom, Titanium, .3415 in. Stem Dia, Set of 8

$2,293.03

COMP Cams Valve, Sportsman, Stainless Steel, Exhaust, For Chevrolet Small Block, 1.600 in. Head, 5.111 in. Length, Each

COMP Cams Valve, Sportsman, Stainless Steel, Exhaust, For Chevrolet Small Block, 1.600 in. Head, 5.111 in. Length, Each

$33.56

MANLEY Valve, Race Master, Exhaust, Bead Loc, 1.575 in. Head Dia, 0.3125 in. Stem Dia, 5.125 in. Length, For Chrysler HEMI, Each

MANLEY Valve, Race Master, Exhaust, Bead Loc, 1.575 in. Head Dia, 0.3125 in. Stem Dia, 5.125 in. Length, For Chrysler HEMI, Each

$50.05

MILODON Valves, Exhaust, Race, Stainless Steel, 1.625 in. Diameter, For Chevrolet, Small Block, 350, 383, 400, Set of 8

MILODON Valves, Exhaust, Race, Stainless Steel, 1.625 in. Diameter, For Chevrolet, Small Block, 350, 383, 400, Set of 8

$414.64

MANLEY Valve, Street Master, Intake, 2.25 in. Head Dia, 0.3415 in. Stem Dia, 5.244 in. Length, BBC, Set of 8

MANLEY Valve, Street Master, Intake, 2.25 in. Head Dia, 0.3415 in. Stem Dia, 5.244 in. Length, BBC, Set of 8

$299.37