Transmission Oil Leaks from Left Side Half Shaft Area on Mercury Milan

If the transmission oil leaks out of left side half shaft area, it may be from a worn axle shaft seal. The seal can be damaged by a poor surface finish on the axle shaft. The axle shaft and seal should be replaced to correct the problem.

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Average mileage: 52,916 (25,000–95,000)
Drive Train affected: Automatic Transmission
2 model years affected: 2009, 2010
9 people reported this problem
2 people shared problem details
2010 Mercury Milan- Automatic Transmission42,000
When engine is cold, shifting from first into second, I got a loud thud or clunk. I brought it to two different mechanics, corrected by one and subsequently had the same problem approx 7000 miles later and they both said the AT fluid seal was defective and was changed. I was also leaking AT fluid.
2010 Mercury Milan- Automatic Transmission41,000
Leaking in the half shaft. The dealer replaced it under warranty. After approx 6,000 miles it started leaking again. The dealer replaced under Ford TSB 11-30-11.
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