Just thought I'd add this as I'm replacing the transmission fluid on my newly acquired 2015 Transit Connect with the Ecoboost 1.6L engine and I noticed that it's different than most everything I've seen discussed on this forum. The transmission in my van has the indicator plug on the right side of the axle and uses a 10mm hex plug instead of a bolt. Here's a couple of pictures of what it looks like. So if you have the Ecoboost engine, this might be what your indicator plug looks like.