Sonnax 56200-03K Pump Flow Control Valve Assembly Kit for Ford 5R55N/5R55S/5R55W

The Sonnax 56200-03K Pump Flow Control Valve Assembly is a drop-in replacement designed to address common flow control valve failures in Ford 5R55N, 5R55S, and 5R55W transmissions. This upgraded assembly supersedes part number 56200-02K and eliminates the sticking and wear problems associated with OE valves through redesigned, precisely machined components.

Common Symptoms of Flow Control Valve Failure:

• Delayed engagement
• Low line pressure
• No movement until RPM is increased
• Excessive pump noise

Key Features and Improvements:

• Harder canister material resists wear and provides improved valve support to prevent sticking
• Case-hardened steel plunger valve with annular grooves prevents side loading
• Larger O-ring eliminates pressure loss at the pump face for improved sealing
• Canister restores the regulated line orifice to improve valve and hydraulic stability
• Complete drop-in-place replacement assembly for easy installation

The OE flow control valve is designed to increase pump efficiency by rerouting excess line pressure back to the suction side of the pump. However, the OE plunger valve commonly becomes stuck open or the canister wears, causing decreased line pressures and delayed engagements. The Sonnax 56200-03K assembly solves these issues with superior materials and engineering.

Kit Includes: Hardened canister, case-hardened plunger valve, replacement spring, and O-ring.