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