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What are the causes of transmission failure in Focus?

1 Answers

DeJayden

07/28/25 10:05pm

Transmission failure in Focus is caused by internal contamination and high temperatures. The specific reasons are as follows: Internal contamination of the transmission: In many cases, when an automatic transmission fails, it is not due to damage to the internal valve body but rather the presence of stubborn dirt and impurities inside. Especially when dirt and impurities accumulate inside the valve body, forming blockages, it becomes impossible to effectively regulate oil pressure, leading to issues such as jerking, impact, and slippage. High temperatures damaging the transmission: High temperatures can degrade the quality and frictional properties of automatic transmission fluid, increasing friction and wear, which results in transmission noise. Additionally, sludge can form inside the transmission, causing jerking and impact. If the temperature exceeds 120°C, rubber sealing materials will begin to harden, eventually leading to leaks and reduced hydraulic pressure. If the temperature rises even higher, the transmission may start to slip, and this slippage can, in turn, cause the temperature to rise further.

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