The TCC relief valve (TCCRV) damper is used in Toyota/Lexus UA80E, UA80F, UB80E and UB80F transmissions to prevent cooler and torque converter return pressure from getting too high. The transmission cooler check valve (TCCV) damper is used to route fluid from the TCC relay valve to the cooler in order to keep the system from overheating, and to supply the lube circuits. This damper closes this connection when the engine is off to prevent torque converter drainback conditions.

When the bores and/or pistons wear out, the pistons can get stuck in place and either block fluid flow or remain open to cause improper fluid flow. This can cause low cooler flow, lubrication failures, torque converter and fluid overheat and related trouble codes, as well as torque converter drainback and delayed engagements code. Replacing these worn out dampers can require replacing the rear valve body casting or the entire control valve body.

Sonnax TCCRV and TCCV damper kit 168740-11K allows long-lasting and quick repair of the rear valve body casting without reaming. The O-ring provides a positive seal against critical pressure loss even in worn bores.

• Carburized steel pistons combat premature wear
• Annular groove provides better piston centering and wear prevention
• 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

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