6L80E TCC Lockup and pressures

[Gordon-0]

All,

Please forgive me if this is written somewhere, but I am new to tuning and I don't really know what exactly I am looking for.
I have a 2012 GMC Yukon with the 6.2 and a 6L80E.
After disabling DoD I have gotten rid all the shudder that I was feeling in the transmission, but I can still see the tach moving indicating TCC slip when it should be more steady.

My wife's cousin works in a trans shop and deals with a LOT of 6L80E transmissions that have failed due to a failed TCC clutch.
His recommendation is to replace the torque converter ASAP, but until that happens he recommends trying to tune out the flare as much as possible.

After logging, I am seeing ~90-120 rpm flare when going from coasting to accelerating on the highway. In the screenshot below it hits 122 rpm (102rpm "error") at ~40% throttle.
The trans quickly (~1-1.5 seconds?) settles it down to 20-50 rpm, and once I hit ~80mph or so the slip goes to zero and pretty much stays there.

My question is this:
I have been gradually upping the pressures in the "apply ramp" table, but don't see much affect.
Is the apply ramp the correct table to be adjusting or do I have this wrong? Or is +70kPa just not enough of a change to notice yet?

Screenshot 2023-12-21 212717.png

also, with regards to logging, I tried setting up a graph in VCM Scanner to mimic that table so I could see what areas of the map I was using when seeing slip. I couldn't get the vertical axis (torque) to register as anything but -17.0 no matter what parameter I tried.

Screenshot 2023-12-21 213755.png
Screenshot 2023-12-21 214004.png

I can post the log if it helps, but hopefully this is a simple question and I am just missing something obvious.

[GHuggins]

FWIW clean your MAF sensor and then open up the torque model section in the editor under the edit tab. Highlight from 1200 over and multiply by 1.05 then retest. This is also assuming you're not running e85 fuel or a mixture there of. Normally fuel trims throw off the torque model and cause this type of failure. As long as your OS is using it the regulator gain is what you need to raise to keep it from bleeding off pressure.

[Gordon-0]

I am actually using E85 at the moment, but I can still clean the MAF and see if that helps. when you say to edit the torque model are you talking about the virtual torque table?
So basically edit the Airmass, MAP, E85 Airmass and E85 MAP for all the spark settings from -10 to 40, from 1200-5600 (max in the table) RPM.

Also, what is up with these tables? On the airmass table at 40 spark for example peak torque is at 1200 rpm? that seems wrong.
the MAP and both E85 tables are more "realistic" with a peak higher up, just the regular airmass table seems to be wrong.

edit:
you can see there's a weird ripple that gets worse with higher spark
Screenshot 2023-12-22 091207.png

[GHuggins]

Just the airmass tables from 1200 up. Yes, I'm not sure how the engineers edit for idle and 1200. It can't be with the engine dyno as it's impossible for an engine to make more torque at idle than at peak cylinder pressure. Only thing I can figure is it is edited with the dyno only where it normally runs or is capable of running and then the rest is interpolated to make that fit. I know the negative areas are done with an electric motor spinning the engines up with the throttle plates closed or at least I'm told. If you're having shifting problems - up and down shifting a lot - usually goes along with this problem - then you can edit the map models. Airmass directly controls pressure. It should also be noted that this is a temporary fix. Converter should be replaced before the material wipes out the pump. It can also be the TCC valve bore. Robert would be the best to point that out in a log with all the necessary trans pressure and tcc parameters.

[TransGo Robert]

I can't help with tuning, but if you post a log I can look at it and tell you if there is an issue with the lock-up if it is doing what it is asked to do.