Symptoms:

  • Slip codes
  • High TCC slip RPM at increasing load
  • Overheated fluid

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:

Sonnax drop-in TCC modulator plunger valve kit prevents future wear and restores proper hydraulic clearances so fluid pressure can position the TCC modulator valve to fully apply lockup.

5R55N

TCC Modulator Plunger Valve Kit
Part No. 56947J-32K

You need this if... View Instructions Find a Distributor

Common complaints with Ford 5R55N units are high TCC slip RPM at increasing load, slip codes, and converter apply or release concerns. These complaints can be caused by wear of the TCC plunger valve and sleeve assembly due to constant oscillation by the pulse width modulated TCC solenoid. Sonnax TCC modulator plunger valve kit 56947J-32K restores hydraulic integrity allowing the TCC modulator valve to fully apply lockup. Drop-in Zip Valve parts install quickly and easily.

  • Plunger Valve
  • Sleeve

Sonnax valve body layouts provide a detailed overview of individual units making it quick and easy to determine what’s available for the specific valve body you’re working on. See all Sonnax valve body layouts.

Ford 5R55N Valve Body Layout

Ford 5R55N Valve Body Layout
  • 5R55N TCC Modulator Plunger Valve Kit 56947J-32K
  • 5R55N TCC Modulator Plunger Valve Kit 56947J-32K

You need this if...

Vacuum testing at the port(s) indicated fails to hold the recommended minimum in-Hg, or if wear is visually detected.

5R55N TCC Modulator Plunger Valve Kit Vacuum Test Locations