5R55N 4-3 Pre-Stroke Valve Spring | Sonnax

Product Description

5R55N 4-3 Pre-Stroke Valve Spring

Sonnax Part Number: 56947J-S1

NO TOOLING REQUIRED

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%

PACKAGE CONTAINS

• Spring (6)

SYMPTOMS

• Code 734, 735
• Solenoid C Code
• No 4th
• No 5th

CAUSE

Breakage of the 4-3 pre-stroke valve spring prevents proper valve function.

CORRECTION

Replace with the reduced-stress Sonnax 4-3 pre-stroke valve spring.

56947J-S1 INSTRUCTIONS