Ford vehicles with 4R70E, 4R70W, 4R75E, 4R75W and AODE transmissions may exhibit insufficient line rise in Reverse, delayed or slipping Reverse, and/or a burnt Reverse clutch. Continuous oscillation of the OE boost valve within the boost sleeve causes premature wear, creating a path for boost pressure to exhaust and causing these concerns. Installing Sonnax boost valve kit 76948-02K eliminates pressure loss, restoring proper line rise and robust Reverse action.

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

Learn More About Zip Valve™ Drop-In Repairs

More From This Category

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, Intake, 2.02 in. Head Dia, 0.3133 in. Stem Dia, 5.035 in. Length, For Chevrolet SB, Each

MANLEY Valve, Race Flo, Intake, 2.02 in. Head Dia, 0.3133 in. Stem Dia, 5.035 in. Length, For Chevrolet SB, Each

$51.07

Sonnax Oversized Tcc Control Valve Kit, Ford 5R55N/S/W, Each

Sonnax Oversized Tcc Control Valve Kit, Ford 5R55N/S/W, Each

$64.46

MANLEY Valve, Titanium, Intake, Bead Loc, 2.3 in. Head Dia, 0.3415 in. Stem Dia, 5.54 in. Length, Each

MANLEY Valve, Titanium, Intake, Bead Loc, 2.3 in. Head Dia, 0.3415 in. Stem Dia, 5.54 in. Length, Each

$325.41

MANLEY Valve, Titanium, Exhaust, Bead Loc, 1.9 in. Head Dia, 0.3415 in. Stem Dia, 5.44 in. Length, Set of 8

MANLEY Valve, Titanium, Exhaust, Bead Loc, 1.9 in. Head Dia, 0.3415 in. Stem Dia, 5.44 in. Length, Set of 8

$2,550.76

MANLEY Valve, Race Flo, Intake, Bead Loc, 2.14 in. Head Dia, 0.3125 in. Stem Dia, 5.135 in. Length, For Chrysler HEMI, Set of 8

MANLEY Valve, Race Flo, Intake, Bead Loc, 2.14 in. Head Dia, 0.3125 in. Stem Dia, 5.135 in. Length, For Chrysler HEMI, Set of 8

$408.60