February 21, 2013
Symptoms:
- Delayed Reverse
- No Reverse
- Slipping gears
- Direct clutch burned
Cause:
Wear at the Reverse engagement valve bore can prevent proper valve positioning, allowing Reverse pressure, which applies the direct clutch, to be reduced.Correction:
Refurbish the valve bore and install Sonnax Reverse engagement valve kit to restore proper hydraulic function and prevent future wear.5R55S, 5R55W
Reverse Engagement Valve Kit
Part No. 56947J-29K
-
Tooling:
- F-27741-TL13
- VB-FIX
You need this if... View Instructions Find a Distributor
In Ford 5R55S and 5R55W units, Reverse pressure from the manual valve is routed through the Reverse engagement valve prior to applying the direct clutch. Excessive wear at the valve bore can prevent solenoid feed oil pressure from correctly positioning the engagement valve, allowing reverse pressure to be reduced. Low Reverse pressure can result in slipping or loss of Reverse, burned direct clutches or delayed Reverse engagement.
- Sleeve manufactured from highly wear-resistant aluminum incorporates the end plug to prevent instability and wear, and provides more sleeve/valve contact for better hydraulic sealing
- Anodized aluminum valve incorporates annular grooves to hydraulically center valve and combat premature wear
- Tool kit can also be used in for 27741-13K, 56947J-23K, 56947J-56K and 56947J-59K
- Valve
- Sleeve
- Spring
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.
Ford 5R55S, 5R55W Valve Body Layout
