I would say your wheel and tire combo does have something to do with your results...Livelink will show a higher logged speed just like your speedo will show a higher speed than actual..You are not covering the same ground per revolution.
And also the PTU is gear on gear so I wouldn't think that was the culprit for any slipping
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Saw a video or online where his car did the exact same thing as mine where it would slip and rev out under hard acceleration. The "lifetime" PTU fluid from ford ending up being more of a gunk/tar than fluid and after he changed it, everything was back to normal. I'll see if I can find the video of it. But if the PTU is gear on gear that would be kinda interesting...
All in all, I had the PTU fluid changed and the tranny fluid which wasnt great as well and the car no longer slips or blows through the converter on hard acceleration. Maybe its 1 or the other or a combination but I am happy either way lol.
Now the car does feel like it holds back power from a HARD launch i.e brake boost or even sometimes If i stab it from a dead stop. RPMs will still climb but the power hits a wall and its very noticable. This is with traction control off too, not a PP model so i can't fully disengage it either. Would this be torque management?
Heres the video I saw on youtube
https://www.youtube.com/watch?v=bIMjbZSrpbAI will try to upload a video of my car I took when it was doing it a couple years ago. Note, the slipping only occured when the tune was uploaded but perfectly fine when stock. For obvious reasons but I couldnt tell when I test drove it before I bought it.
I tried to upload my video but got an error so I uploaded it via youtube, here is the link to my video
https://www.youtube.com/watch?v=-4j7jDHG1EY