GM 6L45, 6L50, 6L80 and 6L90 clutch boost valves provide feedback pressure to their respective clutch regulator valves, balancing the regulators to assist with apply and release of the associated clutch. Pressure control solenoid fluid acts on the boost valve to precisely control the amount of oil delivered to the balance end of the clutch regulator valve. Excess wear in boost valve bores can result in harsh shifts, slipping, burnt clutches, flares, codes and delayed engagement. Reconditioning the bore and installing Sonnax oversized clutch boost valve 104740-01 restores the hydraulic control necessary for trouble-free shifting.
Proper operation of clutch boost valves depends on correct pressure being supplied by shift solenoids. If trouble is found with pressure supply to these solenoids, Sonnax offers oversized AFL valve 104740-12.

Hardcoat anodized aluminum valve combats premature wear
Annular grooves help center valve in bore to reduce future side-load wear

More From This Category

MANLEY Valve, Titanium, Intake, 2.08 in. Head Dia, 0.3415 in. Stem Dia, 5.04 in. Height, Each

MANLEY Valve, Titanium, Intake, 2.08 in. Head Dia, 0.3415 in. Stem Dia, 5.04 in. Height, Each

$302.72

COMP Cams Valve, Sportsman, Stainless Steel, Intake, For Chevrolet Small Block, 2.020 in. Head, 5.011 in. Length, Set of 8

COMP Cams Valve, Sportsman, Stainless Steel, Intake, For Chevrolet Small Block, 2.020 in. Head, 5.011 in. Length, Set of 8

$246.30

MANLEY Valve, Extreme Duty, Exhaust, 2.06 in. Head Dia, 0.3415 in. Stem Dia, 6.7 in. Length, Gen II, Each

MANLEY Valve, Extreme Duty, Exhaust, 2.06 in. Head Dia, 0.3415 in. Stem Dia, 6.7 in. Length, Gen II, Each

$139.15

MANLEY Valve, Titanium, Intake, 2.15 in. Head Dia, 0.3415 in. Stem Dia, 5.64 in. Height, Set of 8

MANLEY Valve, Titanium, Intake, 2.15 in. Head Dia, 0.3415 in. Stem Dia, 5.64 in. Height, Set of 8

$2,564.57

MANLEY Valve, Race Flo, Exhaust, 28.5 mm Head Dia, 5.5 mm Stem Dia, 102.70 mm Length, For Honda, Each

MANLEY Valve, Race Flo, Exhaust, 28.5 mm Head Dia, 5.5 mm Stem Dia, 102.70 mm Length, For Honda, Each

$50.05

MANLEY Valve, Severe Duty, Exhaust, 1.88 in. Head Dia, 0.3715 in. Stem Dia, 5.354 in. Length, BBC, Set of 8

MANLEY Valve, Severe Duty, Exhaust, 1.88 in. Head Dia, 0.3715 in. Stem Dia, 5.354 in. Length, BBC, Set of 8

$607.34