I’m surprised at how few UOA’s there are for Mercon LV, or any ATF’s in the 6r80 ...except for one guy checking every 15k (Fusion...not 6r80), and the YouTube Amsoil guy posted by StevieC. Anyway, IMHO, this “lifetime” fluid would never make it to 150k...the official drain recommendation. This was the factory fill. No towing, 75% highway, some dirt road use. FYI, on Transit you cannot drop the pan without removing a large suspension subframe crossmember. Engineering marvel.
More humble advice...don’t believe Ford recommendation. I think I stretched it as far as (or further than) I should. After this sample (taken in February), dealer tried to F me. I made appointment for complete fluid exchange, was VERY explicit what I wanted, then caught them doing a partial drain & fill...they said their machine had “just” broken.
I still intend to get full fluid exchange...but supposedly only dealers can do the Transit...no Indy I called would / could do it.
More humble advice...don’t believe Ford recommendation. I think I stretched it as far as (or further than) I should. After this sample (taken in February), dealer tried to F me. I made appointment for complete fluid exchange, was VERY explicit what I wanted, then caught them doing a partial drain & fill...they said their machine had “just” broken.
I still intend to get full fluid exchange...but supposedly only dealers can do the Transit...no Indy I called would / could do it.
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