Sonnax 56947J-01K TCC Modulator Plunger Valve Kit Ford 5R55S 5R55W

The Sonnax 56947J-01K TCC modulator plunger valve kit is designed to restore hydraulic integrity to the torque converter clutch (TCC) solenoid circuit in Ford 5R55S and 5R55W transmissions. This precision-engineered drop-in kit addresses common issues including high TCC slip RPMs under load, slip codes, and converter apply or release concerns.

Problem It Solves:

The valve bore inward of the TCC modulator sleeve experiences rapid wear due to constant oscillation from the pulse width modulated TCC solenoid. When this sleeve wears, converter apply pressure is reduced and TCC slippage increases. The plunger valve positions the TCC modulator valve, which feeds line pressure to the apply circuit that controls slip rate.

Key Features:

• Restores proper hydraulic clearances for full TCC lockup application
• Precisely toleranced components ensure optimal fit and performance
• Increased ratio assembly provides firmer and quicker lockup feel
• Drop-in installation with OE retaining clip (reuse original)
• Includes hardened valve and wear-resistant aluminum sleeve

Kit Contents:

• TCC modulator plunger valve (OE ratio)
• High-grade aluminum sleeve

This kit enables fluid pressure to properly position the TCC modulator valve for complete lockup engagement, eliminating slip and restoring normal transmission operation. Vacuum testing should achieve a minimum of 18 in-Hg after installation.