I'm about a month (1300 miles) into the swap from my 2018 KingRanch and so the data-comparison is starting to shape up. So I thought I'd share a few things as I go and maybe it will have value, maybe not.
I can tell you a few of my favorite Gen2 3.5 Ecoboost/10r80 differences, as well as anything I don't like as much.
Top billing is the increase in oil pressure at idle and low-torque demand cruising! Yaw have suffered my oil pressure rant for more than 3 years, so I won't re-hash, but this truck idles and cruises at 36-40psi. SO MUCH BETTER than 22-26. (I fully admit that I have no expertise on the subject, but oil pressure in the low 20's at 70mph would creep me out)
Second billing is the ECT Temps. It's already nasty hot down here in the tropic of coastal Texas. 95-100F with the heat index hitting 105F on the trucks ambient temp gauge. But where the KingRanch operated in the 208-216F ECT range, this truck is in the 187-196F range. I'm stunned. I really really want to know what Ford did?
Note: I haven't towed anything yet, so please don't think I am implying........
I'm only saying that this truck stays below 200F in typical daytoday use.
Obviously I do not know what role the electric motor assist plays in the ECT's. I DO however know that it is part of the equation in what I describe as an irritating clumsiness from a dead start in "Normal Mode". The truck attempts to be an EV truck, but since that electric motor isn't strong enough to provide the torque request of "let's go", the ecu changes its mind and says "let's go ICE", at about the same moment that the transmission has been told to skip 2nd gear and go to 3rd. The whole thing is just clumsy. Irritating.
Ironically, Normal mode doesn't skip 4th and 6th like the KingRanch did. Which is GREAT! Other than the clumsy start, Normal mode is actually just fine for normal driving. Go figure. That's definitely a substantial change in Fords 10r80 strategy.
There ARE 2 different things that I can do to mitigate the stumble. First I can just be intentionally aggressive with the throttle from a stop and force the truck to completely give up on the idea of even trying to be EV. This also causes Normal Mode to use 2nd gear, therefore the truck doesn't skip any gears, just like Sport mode on the KingRanch. Or I can take off intentionally like an old geezer and the truck will not only use 2nd gear, but may even stay in EV mode for a little longer and as a result have some momentum before it switches to ICE, which is completely transparent most of the time.
By the way, Sport Mode seems to nix EV altogether and the truck is a completely normal ICE truck with a 10-speed, albeit with considerably increased tip-in throttle mapping. Even more aggressive and "Sporty" than the ICE only KingRanch.
In summary, increased oil pressure, decreased ECT's, and a Normal mode that is better AND worse than the previous truck.
From what I have heard, the actual motor itself is the same Gen2 3.5 Ecoboost between the two trucks. Including the cheap cast pistons and poor ring-pack. But there does seem to be significant changes in the software at least. And there's definitely a substantial engineering difference in the 10r80 to accommodate the Hybrid hardware and the re-engineered transmission cooling.
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