Right, you said that before and I trust your experience, but there’s got to be some other variables going on. Just wondering, when (if ever) was your trans software updated? I took mine in May ‘22 for the occasional clunky downshift and of course the dealer claimed they couldn’t duplicate my issue, and would not do the update, even though I would have paid for it.
(Side note, it’s also the dealer that drained my 800-mile old Ravenol DXG and did an oil change I didn’t ask for; when I complained the service manager said he would “comp” the oil change since it was their fault. I later realized that JA had simply charged it to the points on my RewardsPass account. Karma did her job though; about 4 months later that dealer lost their Ford franchise, and went out of business last month.)
Back to the story… I’ll have to call Dave and see if their 10R80s are on the latest software, or if any of them have had the CDF drum replaced at any point. I’m wondering if your negative issues can be isolated to a single variable: is it that the fluid is “too thick”; is it a limitation of a certain software version (or age of software); could it be tied to a given CDF drum revision; or is it because there’s already some wear or misalignment in your CDF sleeve that is “helped” by the thinner fluid flowing thru the partially-misaligned sleeve? And I’m speaking in general 10R80 terms, not just yours. Like, if someone had a brand new 10R80 with the newest drum revision and newest software, would the thicker fluid be able to be adapted to?
The biggest problem IMO is that Ford still hasn’t figured this out, it’s such an expensive issue to fix if not under warranty, and it’s not really easy to verify if any of these intermediate steps actually “fixes” the issue. We’re all kinda just waiting for a failure to occur.