Complaints of no 4th or 5th Gear, codes 734 and/or 735 and solenoid C codes can occur on the Ford 5R55N due to a broken 4-3 pre-stroke valve spring. The 4-3 pre-stroke valve controls the apply and release rate of the intermediate servo and direct clutch, which should be applied in 4th and 5th Gear. Sonnax 4-3 pre-stroke valve spring 56947J-S1 addresses these complaints. This spring is not used on 5R55W & 5R55S units.

Spring is made from chrome-silicon alloy, which allows higher working stresses than typical music wire spring material
Spring configuration reduces operating stresses at the critical regulating positions of the valve by 8%

More From This Category

MANLEY Valve Spring, NexTek, Drag Race, 1.311 in. OD, 353 lbs./in. Rate, 1.100 in. Coil Bind Height, Single, Each

MANLEY Valve Spring, NexTek, Drag Race, 1.311 in. OD, 353 lbs./in. Rate, 1.100 in. Coil Bind Height, Single, Each

$45.07

COMP Cams Valve Spring Shim, Steel, Hardened, 1.480 in. OD, .765 in. ID .060 in. Thick, Set of 16

COMP Cams Valve Spring Shim, Steel, Hardened, 1.480 in. OD, .765 in. ID .060 in. Thick, Set of 16

$25.76

MANLEY Valve Spring Retainer, 7 Degree, +.100 in, Tensile Max, 1.500 in. OD, Double, Each

MANLEY Valve Spring Retainer, 7 Degree, +.100 in, Tensile Max, 1.500 in. OD, Double, Each

$72.41

AFR Spring Cup, O.D. 1.380 OD x 1.300 ID x .570 ID (Fits 8017 &8019 spring), Ea.

AFR Spring Cup, O.D. 1.380 OD x 1.300 ID x .570 ID (Fits 8017 &8019 spring), Ea.

$11.13

COMP Cams Valve Lock, Steel, 10 Degree, 11/32 in, Single Groove, w/ Lash Cap Recess, Set of 8

COMP Cams Valve Lock, Steel, 10 Degree, 11/32 in, Single Groove, w/ Lash Cap Recess, Set of 8

$30.97

COMP Cams Valve Lock, Stamped, Hardened Steel, 7 Degree, 11/32 in. Valve Stem, Single Groove, Set of 12

COMP Cams Valve Lock, Stamped, Hardened Steel, 7 Degree, 11/32 in. Valve Stem, Single Groove, Set of 12

$23.92