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What Causes Transmission Oil Leakage in Changan Ford Focus?

2 Answers

TessaAnn

07/25/25 8:05am

Changan Ford Focus transmission oil leakage may be caused by the following reasons: 1. Oil seal issues: Aging or deformed oil seals, detached oil seal springs, or incorrectly installed oil seals can all cause the oil seal to lose its oil-blocking function. In such cases, the aged or deformed oil seals should be replaced. 2. Joint problems: Damage to the joint surface of the transmission case may require adding thicker paper gaskets at the damaged area. If leakage persists, welding repair may be necessary. 3. Vent blockage: A blocked transmission vent can isolate the transmission from the external atmosphere during operation, leading to increased internal pressure and oil seepage from the blocked area. It is essential to keep the transmission vent clear to reduce internal pressure and prevent oil leakage.

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ZoeyMarie

08/10/25 6:48pm

I've encountered many cases of transmission oil leaks in Focus models, with aging seals being the most common issue. After five or six years of driving, the rubber seals tend to harden and crack, especially the axle shaft seals which are particularly vulnerable. Another frequent problem is aging and deformed gaskets causing poor sealing—replacing the gasket usually solves this. Sometimes overfilling the transmission fluid can also lead to leaks, as excessive oil pressure finds any gap to escape through. If you notice oil stains when inspecting the undercarriage, don't panic—wipe it clean and drive for a couple of days to pinpoint the leak source. The worst scenario is a damaged or deformed transmission casing; I once saw a case where a rock impact cracked the housing. Untreated oil leaks can lead to low fluid levels and overheating, ultimately resulting in much costlier repairs.

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