The actuator feed limit (AFL) valve in GM 4L80-E and 4L85-E units has a large reaction area and is greatly affected by side loading, which wears the valve body bore. The EPC solenoid oscillates the torque signal and AFL oil, which increases valve action and accelerates wear. As bore wear increases, oil pressure is reduced to the shift solenoids, which causes solenoid and ratio codes. The same AFL oil loss results in lower line pressure.
Installing Sonnax actuator feed limit valve kit 34200-16K corrects AFL oil pressure loss, restoring shift solenoid pressure to prevent wrong gear starts and other shift concerns. The hard-coat anodized valve is extremely wear resistant, and annular grooves have been added to minimize the effect of side loading. The Sonnax wear-resistant sleeve provides more valve contact area, providing additional support and further reducing valve and bore wear.

Kit includes wear-resistant sleeve and anodized valve with annular grooves to prevent side loading
Valve operates in full-contact sleeve, providing 54% more support
Boosts oil pressure to the shift solenoids
Eliminates AFL oil loss, corrects low line pressure

More From This Category

MANLEY Valve, Race Master, For Toyota 3UR-FE, 38mm Head Dia, Each

MANLEY Valve, Race Master, For Toyota 3UR-FE, 38mm Head Dia, Each

$48.92

MANLEY Valve, Race Flo, Intake, Bead Loc, 2.02 in. Head Dia, 0.3125 in. Stem Dia, 4.955 in. Length, For Chrysler HEMI, Each

MANLEY Valve, Race Flo, Intake, Bead Loc, 2.02 in. Head Dia, 0.3125 in. Stem Dia, 4.955 in. Length, For Chrysler HEMI, Each

$142.29

Sonnax Oversized Pressure Regulator Valve, ZF5Hp19, Late Vb E18.2, Each

Sonnax Oversized Pressure Regulator Valve, ZF5Hp19, Late Vb E18.2, Each

$74.75

Trick Flow Valve, Exhaust, Stainless Steel, 1.760 in. Diameter, .341 in. Stem, 5.060 in. Length, Big For Ford, Each

Trick Flow Valve, Exhaust, Stainless Steel, 1.760 in. Diameter, .341 in. Stem, 5.060 in. Length, Big For Ford, Each

$76.10

MILODON Valves, Intake, Race, Stainless Steel, 2.30 in. Dia, +.350 Long, Big For Chevrolet, 396, 427, 454, 502, Each

MILODON Valves, Intake, Race, Stainless Steel, 2.30 in. Dia, +.350 Long, Big For Chevrolet, 396, 427, 454, 502, Each

$79.09

Sonnax Oversized Tc Pressure Valve Kit, Chrysler, Ch 845Re, ZF8Hp/45/55/70, Each

Sonnax Oversized Tc Pressure Valve Kit, Chrysler, Ch 845Re, ZF8Hp/45/55/70, Each

$37.73