September 30, 2005
Sonnax tool kit [56947-TL] must be used to resize the valve body bore to accept this repair. This tool kit is no longer in production, but may still be available from distributor inventory.
Typical complaints about vehicles with an Ford A4LD transmission include soft shifts, low line pressure, and/or converter apply problems. A worn valve body bore at the pressure regulator valve can often cause these complaints. Line pressure is allowed to leak to exhaust, preventing the valve from stroking properly and feeding the converter apply circuit. Sonnax oversized pressure regulator and boost valve kit 56947-06K restores the hydraulic integrity of the circuits.
Vacuum testing at the port(s) indicated fails to hold the recommended minimum in-Hg, or if wear is visually detected.