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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 wear-resistant Sonnax 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

TCC Modulator Plunger Valve Kit
  • 56947j-32k_combo

  • TCC Modulator Plunger Valve Kit

Small_56947j-32k_combo Small_56947j-32k

5R55N

TCC Modulator Plunger Valve Kit

Part No. 56947J-32K

  • Plunger Valve
  • Sleeve

Complaint:

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

Common complaints with a 5R55N are high TCC slip RPM at increasing load, slip codes, and converter apply or release concerns. These complaints can be caused by wear of theTCC plunger valve and sleeve assembly due to constant oscillation by the pulse width modulated TCC solenoid.

You need this if...

A vacuum test fails to yield 18 in-hg or greater, or if visual wear is detected.

  • Test Locations

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Valve Body Layouts

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.

Valve Body Layout Ford 5R55N
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