November 14, 2016
Common complaints with listed Ford units include delayed lockup, shudder, no lockup or converter codes. When too much oil is routed to this plunger valve, the bypass valve has slow reaction from MCC/TCC solenoid oil. If there is excessive wear at the plunger valve, regulated converter charge oil can leak to exhaust. Because this regulated converter charge oil is always present, either as release or apply pressure, severe leakage at the sleeve can result in TCC slip or no apply condition. Sonnax bypass clutch control plunger valve kit 76948-04K restores hydraulic integrity and will eliminate these problems.
Vacuum testing at the port(s) indicated fails to hold the recommended minimum in-Hg, or if wear is visually detected.