Symptoms:

Delayed Forward
Loss of Forward
Slipping gears
Burnt Forward clutch

Cause:

Wear at the forward engagement valve bore can prevent proper valve positioning, allowing forward clutch feed pressure to be reduced.

Correction:

Recondition the bore and install Sonnax oversized forward engagement valve kit to restore proper hydraulic function and prevent future wear.

5R55N

Oversized Forward Engagement Valve Kit
Part No. 56947J-56K

Tooling:

F-27741-TL13
VB-FIX

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Line pressure from the manual valve in Ford 5R55N transmissions is routed through the forward engagement valve in all forward gears prior to applying the forward clutch. Excessive wear at the valve bore or end plug can prevent solenoid feed oil pressure from correctly positioning the engagement valve or allow forward clutch feed pressure to exhaust. This reduced pressure can result in slipping or loss of forward gears, burnt forward clutch or delayed forward engagement. Sonnax oversized forward engagement valve kit 56947J-56K can restore proper hydraulic function and prevent future wear.

Note

Associated tool kit F-27741-TL13 can be used with multiple Sonnax kits, including one other 5R55N application, three 5R55W and 5R55S applications, and a Toyota U150/U250E application.

Contents

Valve
End Plug
Spring

Valve Body Layout

Sonnax valve body layouts provide a detailed overview of individual units making it quick and easy to determine what’s available for the specific valve body you’re working on. See all Sonnax valve body layouts.