Sonnax Line Pressure Modulator Plunger Valve Kit E4OD 4R100

Sonnax Line Pressure Modulator Plunger Valve Kit for E4OD 4R100 In some Ford E4OD and 4R100 transmissions, issues such as soft 1-2 or 2-3 shifts, intermittent harsh shifts, or poor line pressure rise can occur. These problems are often due to ECU (electronic control unit) or accumulator pressure issues, with severe wear of the line pressure modulator sleeve being a common cause. This wear allows EPC (electronic pressure control) oil to leak past the valve, resulting in soft shifts, or causes the valve to stick, leading to harsh shifts. The Sonnax line pressure modulator plunger valve kit 36948-03K addresses these issues by eliminating oil loss and restoring proper function. Key Features: Sleeve is crafted from carbon steel to prevent excessive wear. Valve is made from hardened alloy steel, enhancing wear resistance. O-Ring helps prevent EPC oil loss, maintaining optimal pressure. Annular grooves in the valve help center it in the sleeve, reducing sideloading. Improves shift firmness a