TCC Modulator sleeve 5R55W, 5R55S Increased ratio

TCC Modulator sleeve 5R55W, 5R55S Increased ratio Sleeve Valve Increased ratio Some common complaints associated with a 5R55W and 5R55S are high TCC slip RPMs under increasing loads, slip codes, and converter apply or release concerns. These complaints are often caused by wear at the ID of the TCC modulator plunger valve sleeve, due to constant oscillation by the pulse width modulated TCC solenoid. This plunger valve positions the TCC modulator valve, which feeds line to the apply circuit, which controls slip rate. Wear of the sleeve will allow the TCC slip rate to continue to rise, and could prevent full lockup. Symptoms: High TCC slip RPM at increasing load Overheated fluid Slip codes Cause: The plunger force is transferred onto the inner modulator valve. When the sleeve wears, the converter apply pressure is reduced and TCC slippage increases. Correction: The Sonnax assemblies restore proper hydraulic clearances so fluid pressure can position the TCC modulator valve to fully apply lockup. The increasecd ratio assembly provides a firmer and quicker lockup feel. NOTE: The valve bore inward of this TCC modulator sleeve wears rapidly. Always inspect for bore wear at the largest spool of the inner valve.