Symptoms:

  • Lube failures
  • TCC apply & release concerns
  • Overheated fluid
  • Overheated converter
  • Delayed engagement

Cause:

Bore and/or piston wear in the signal damper can allow TCC signal oil pressure to be exhausted, preventing correct TCC apply.

Correction:

Sonnax drop-in TCC signal damper piston kit corrects circuit pressure variation by replacing the worn OE damper without the need of modifying the valve body.

Warning:

Some later model separator plates, on 10R80 only, may not have a hole over the accumulator lineup. If there is no hole, it is not necessary to install this TCC signal damper piston kit.

10L80 (Gen. 1), 10L90 (Gen. 1), 10R60, 10R80

TCC Signal Damper Piston Kit
Part No. 105740-06K

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

TCC signal dampers are used in Ford 10R60, 10R80 and GM Gen. 1 10L80/90 transmissions to dampen or smooth out the signal fluid pressure applied from the TCC solenoid before being routed to the TCC control valve. This damper piston helps provide a smooth operation of the converter by removing the pressure spikes. When the bore and/or piston wears out, it cannot effectively dampen the variation in pressure. This can result in lube failures, TCC apply and release concerns, overheated fluid or converter and delayed engagement. Replacing the worn out damper can require replacing the entire control valve body.

Sonnax TCC signal damper piston kit 105740-06K allows long-lasting and quick repair of the lower valve body casting without reaming. The O-ring provides a positive seal against critical pressure loss even in worn bores.

  • Hardcoat anodized aluminum piston combats premature wear
  • Annular groove added to the piston to reduce wear rate
  • Highly wear-resistant sleeve prevents future wear
  • O-Ring provides positive seal to prevent critical pressure leakage in already worn bores
  • Mating spring re-establishes OE dampening action
  • Drop-in Zip Valve™ parts install quickly and easily
Learn More About Zip Valve™ Drop-In Repairs
  • Plug
  • Piston
  • Sleeve
  • Spring
  • O-Rings (2) 1 Extra

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 10R60, 10R80, 10R90, 10R140 Valve Body Layout

 Ford 10R60, 10R80, 10R90, 10R140 Valve Body Layout

  • 10L80 (Gen. 1), 10L90 (Gen. 1), 10R60, 10R80 TCC Signal Damper Piston Kit 105740-06K
  • 10L80 (Gen. 1), 10L90 (Gen. 1), 10R60, 10R80 TCC Signal Damper Piston Kit 105740-06K
  • 10L80 (Gen. 1), 10L90 (Gen. 1), 10R60, 10R80 TCC Signal Damper Piston Kit 105740-06K details

You need this if...

10L80 (Gen. 1), 10L90 (Gen. 1), 10R60, 10R80 TCC Signal Damper Piston Kit Vacuum Test Locations