They did not update the TSB AFAIK, but the fix should apply to all 2010-12 SHOs, probably the Flex as well. There is a possibility that the trans-PTU seal is leaking pushing trans fluid into the PTU, which then comes out of the vent tube. Refer to
this webpage.
Expert: Kenny Z. replied 2 years ago.
22381 PTU INPUT SEAL - NEW ESSENTIAL SPECIAL SERVICE TOOL (ESST) AND WSM PROCEDURE
ESSENTIAL SPECIAL SERVICE TOOL (ESST) KIT #308-777 IS NOW AVAILABLE TO SERVICE THE PTU
INPUT SEAL (-7H469-) INSTEAD OF REPLACING THE PTU. ONLINE WORKSHOP MANUAL (WSM)
HAS BEEN UPDATED. REFER TO WSM, SECTION 308-07B. USE AVAILABLE SERVICE LABOR TIMES.
EFFECTIVE DATE: 31-MAY-2012
Kenny Z., Ford Senior Master Tech
The
TSB 11-4-20 seems relevant here.