The clutch boost valve in GM Gen. 1 6T30/40/45/50 first generation units provides feedback pressure to the 1-2-3-4 clutch regulator valve, balancing the regulator to assist with apply and release of the clutch pack. Pressure control solenoid fluid acts on this valve to precisely control the amount of oil delivered to the balance end of the clutch regulator valve. Wear in the clutch boost valve bore can result in harsh shifts, slipping, burnt clutches, flares and delayed engagement. Reconditioning the bore and installing Sonnax oversized clutch boost valve 144740-22 restores the hydraulic control necessary for trouble-free shifting.
Proper operation of clutch boost valve depends on correct pressure being supplied by shift solenoids. If trouble is found with pressure supply to these solenoids, Sonnax offers oversized solenoid regulator valve 144740-01.

Hardcoat anodized aluminum valve combats premature wear
Oversized valve engineered to perform to OE specification

More From This Category

MANLEY Valve, Severe Duty, Exhaust, 1.625 in. Head Dia, 0.3415 in. Stem Dia, 5.465 in. Length, Each

MANLEY Valve, Severe Duty, Exhaust, 1.625 in. Head Dia, 0.3415 in. Stem Dia, 5.465 in. Length, Each

$75.93

MANLEY Valve, Race Master, Intake, 2.02 in. Head Dia, 0.311 in. Stem Dia, 5.728 in. Length, For Dodge, Set of 10

MANLEY Valve, Race Master, Intake, 2.02 in. Head Dia, 0.311 in. Stem Dia, 5.728 in. Length, For Dodge, Set of 10

$500.47

MANLEY Valve, Severe Duty, Exhaust, 1.9 in. Head Dia, 0.311 in. Stem Dia, 5.522 in. Length, For Chevrolet BB, Each

MANLEY Valve, Severe Duty, Exhaust, 1.9 in. Head Dia, 0.311 in. Stem Dia, 5.522 in. Length, For Chevrolet BB, Each

$75.93

MANLEY Valve, Race Flo, Intake, 2.165 in. Head Dia, 0.3133 in. Stem Dia, 5.2 in. Length, For Chevrolet L92, Each

MANLEY Valve, Race Flo, Intake, 2.165 in. Head Dia, 0.3133 in. Stem Dia, 5.2 in. Length, For Chevrolet L92, Each

$51.07

MANLEY Valve, Titanium, Intake, Bead Loc, 2.08 in. Head Dia, 0.311 in. Stem Dia, 5.14 in. Height, Each

MANLEY Valve, Titanium, Intake, Bead Loc, 2.08 in. Head Dia, 0.311 in. Stem Dia, 5.14 in. Height, Each

$320.57

MANLEY Valve, Extreme Duty, Exhaust, 1.88 in. Head Dia, 0.3415 in. Stem Dia, 5.522 in. Length, For Chevrolet BB, Each

MANLEY Valve, Extreme Duty, Exhaust, 1.88 in. Head Dia, 0.3415 in. Stem Dia, 5.522 in. Length, For Chevrolet BB, Each

$129.64