Time to weigh in. I'm the casting supplier for this motor and sit in the Quality room each morning where warranty issues are discussed and allowed or dis-allowed, so you can see how this piqued my interest. No, I'm not a Ford official.
More than one ecoboost motor has shown up for warranty replacement with rods through the side of the block. Rare, but it happens. Often, an aftermarket tune is detected and warranty is disallowed. I have the data, but I digress.... I put the v-10 tune into my car in 2016 and drove it VERY happily through 13.20's in the quarter and 22 miles per gallon daily driving. Zero issues of any kind.
Then, earlier this year I got my first v-11. After installing and driving around for awhile on a 50 degree day, I did 5 drag starts and ran it up through third gear. NO issues. Ran stronger, and I got excited sensing 12's were finally here.
HOWEVER, the next morning on the way to work, I did my usual daily 'stand on it' going up the highway ramp to quickly attain merging speed and keep the intercooler clean. The sequence is: 1. 90 degree right turn onto the ramp. 2. Slow enough for car to drop to first gear on WOT. 3. Steer. This time I got a very alarming change to the expected results. The tach needle went to the end of travel and turned red, bouncing back and forth between 6500 and 7000. It did not shift to second and I could feel the rev limiter pulsating to keep the motor in the car. I let off, though it took a second to realize I needed to let off, and I got back in after it finally shifted. Then, it did the same thing from second to third, though this time I was ready.
I granny-drove the car after that and wrote to Anthony at LMS expaining my situation. He was fast with a reply. Check transmission fluid level, wait 15 minutes for the car to warm up before WOT runs, install two more different tunes to see which one works better.
I ordered stock plugs and gapped them to a perfect .031". Checked the tranny fluid, which was on the 'min' level and added 16 ounces. Then, after verifying that 16 took it to 'max' on the dipstick, I added 16 more ounces to overfill per Anthony's instructions. One quart total added. I then put in the newly revised v-11 tune Anthony sent, LMS 93 PERF v11 3BAR and drove normally for two weeks. Lots of throttle on the up ramp, but no wot. Then I began WOT tests. Mostly, the car pulled hard and shifted okay. But on one try, completely warmed up, it happened again. Red tach needle and no shift. More like it went into neutral.
Took out LMS 93 PERF v11 3BAR, and installed LMS 93v11 SHIFT 3BAR, drove aggresively but no WOT for two weeks. It's better, but last week on the ramp fully warmed up, tach needle turned red, rev limiter kicked in, but it did shift.
Just had back surgery, so I'm off the road, which brings my story up to today.
One thing I have learned in my career is to never let the customer do my trials when I think I have a fix in place. Recurring issues could easily get me fired. I've been doing this over eight years so I know how it's done.
My fear is Anthony isn't quite to a solution and is collecting data using his customers feedback. I know if I believe I've solved a customer issue, I HAVE to bring data or my credibility goes down the toilet. Saying someone is working on something should never mean they are using customer feedback to generate solution data. Motors can break, and people in the warranty dept are very smart.
My plan when I get back to driving is to go back to the stock tune, cause I don't want my baby to break. She's the best car I ever owned. I'm watching with interest Omahahn's progress with the gearhead tune, as I may follow suit. Or, I may ask Anthony to give me the v-10 back. I'm writing this to help omahahn in his quest, as I share that.
Hope this helps. I feel like this forum is family.