Help flair full throttle 4-5 shift

[Maxim]

I did another test and 4-5 is still slipping.
2-3 3-4 are perfect but 4-5 is just not having it. Here's the log Log 3-4 4-5.hpl
I also logged the PCS pressure when it was making that noise and during the time it makes the noise PCS2 goes to 296 then 0 then back to 296. You can see it in the beginning of this log #2 (1).hpl. On an older log I see the same behavior, but its so strange how all of this just suddenly occurs after not driving the car for a month.

[hjtrbo]

The pulses are your clutch purge. Leave that alone.
Screenshot 2022-10-07 150443.png

Still reckon there is some adjustment left. If this doesn't work I reckon you're out of luck. The base file is yours from post #33.

[Maxim]

Yeah, I feel like the trans is probably going to have to come out and get torn apart.
I'll give that file a try soon and let you know how it goes.

[Maxim]

So my trans builder suggested I put a stock trans tune on the car and try it out. I did and it's still slipping.
The noise has progressively gotten worse as well so looks like something is really messed up for whatever reason.

Going to take the trans out and tear it apart to see what is going on.