February 21, 2013
In Ford 5R55W and 5R55S transmissions, bore wear at the VFS1 (PCA) and VFS2 (PCB) locations allows modulated line pressure to exhaust instead of feeding the overdrive, intermediate or low/reverse servos or the coast clutch. Fluid pressure loss at these apply components results in low line pressure, shift complaints and burnt clutches and bands. The Sonnax VFS modulator control sleeve and valve kit 56947J-19K allows correct hydraulic pressures to be restored to these critical apply components.
Kit works in either the VFS1 or VFS2 modulator control bore location.
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