JGN12

omar302, As to your first point re: PTU vs RDU, I have no knowledge about that. As to your second point, you're correct that generally speaking (but not always), complex industrial and military mechanical systems are designed to an indefinite life with mx schedules designed accordingly to support an indefinite life. That begs the question, what did Ford intend for it's Edge when it specified NO lubrication service on the AWD system unless it showed leakage, yet, they're specifying 200,000 miles or 10 years initial replacement of engine coolant. To me, that indicates they're obviously looking way, way beyond 200K miles and 10 years for the AWD servicing. I think they may have designed a mechanical unit that just needs some lubrication but is irrelevant about flaking or minor mechanical wear. Just my thinking from my experience as a designer and an educated consumer. They would never be motivated to recommend something that proves them wrong. I think it's possible they invented the equivalent of the "sealed roller bearing" in a gearbox. When the un-serviceable sealed roller bearing came out, lots of folks threw down the red flag saying it was impossible. Just a thought.

Thank you for your insight. I'm still reluctantly going to go with the "never unless it leaks" until and unless I see some good quantitative data showing the Ford engineering mx schedule is flawed. I get everything you're saying and what the mechanics are saying, but I'm a mechanical engineer that's spec'd complex systems myself and I also have 20 years experience looking at USAF SOAP/JOAP chemical oil samples of jet engines and helicopter transmissions and analyzing them to determine mx schedules. There's much more than gut feel based on color and shavings. That being said, there's absolutely NOTHING wrong with changing lubrication more often than spec'd. It will indeed lead to increased life every single time. The question is an economic and environmental question- should you change much more frequently to get a (maybe) longer life at greater expense or change according to the schedule to reduce expense and environmental impact. It's the user's choice and like I said, I'm interested why you chose the former. I understand it and appreciate it, but it's not yet for me.

Thank you for the reply- I appreciate it. I, personally, find his analysis unconvincing and ill-informed but that's just my opinion and he has his, and I get it and respect it. I'm still reluctant to go with the manual saying "never unless you see leaks, but I'm also an engineer that designs mechanical systems and I have written specified maintenance schedules on my own systems because I understand them better than a layman; so I'm reluctant to spend money and waste resources if it's not necessary. Still researching and learning... Thank you again!

I'm very interested why you're planning to change this fluid. Trying to get my head around my manual's scheduled maintenance for this being "never, unless it shows sign of leakage," and my local dealer's recommendation that the manual's "never needs servicing" is nonsense and it should be changed every 50,000 miles or so, and you're changing at 18,000 miles? Please let me know what you've heard and why you're changing it. Thanks

I just bought a used 2020 Edge Titanium and it has a CD player slot and an eject button next to it. But, if I try to insert a CD, there's nothing in there to insert it into- it will go about 1/3 of the way in but I can flop it up and down. I also read that Ford eliminated the CD player for 2020 models. Is it possible there isn't the CD player but the left the slot?