Transmission Parts Ford 5R55N Valve Body Valve / Sleeve

Symptoms:

TCC apply concerns
TCC codes
Delayed engagement
Burnt converter

Cause:

Wear at the TCC back pressure valve bore prevents proper pressure from reacting on the cover side of the converter clutch, resulting in apply compaints.

Correction:

Refurbish the valve bore and install the Sonnax oversized TCC back pressure valve kit to restore proper hydraulic function and prevent future wear.

Warning:

Required tool kit F-56947J-TL63 is no longer in production. Check with your distributor for availability.

5R55N

Oversized TCC Back Pressure Valve Kit
Part No. 56947J-63K

Tooling:

F-56947J-TL63
VB-FIX

You need this if... View Instructions Find a Distributor

In Ford 5R55N units, as the valve bore wears at the inboard spool, converter clutch back pressure escalates with increased temperature and the back pressure valve does not stroke, preventing the TCC from applying fully. Wear at the outboard spool bore allows converter clutch pressure to exhaust, which reduces correct release pressure and allows the converter clutch to contact the cover prematurely. Sonnax oversized TCC back pressure valve kit 56947J-63K will restore proper hydraulic function and prevent future wear.

Contents

Valve
Spring
End Plug

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.