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What are the causes of transmission failure in Focus?

1 Answers

VonGabrielle

07/30/25 12:19am

Transmission failure in Focus is mainly caused by internal contamination and high temperature. The specific reasons are as follows: 1. Internal contamination of transmission: Many cases of automatic transmission failure are not caused by valve body damage, but by persistent dirt and impurities inside, especially when contaminants accumulate in the valve body causing blockages. This prevents effective regulation of oil pressure, leading to jerking, impact, and slippage issues. 2. High temperature damaging transmission: High temperature degrades the quality and friction characteristics of automatic transmission fluid, increasing friction and wear. This results in transmission noise and sludge formation inside the transmission, causing jerking and impact. When temperature exceeds 120°C, rubber sealing materials begin to harden, eventually leading to leaks and reduced hydraulic pressure. At even higher temperatures, the transmission starts slipping, which in turn causes further temperature rise.

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