Here is a t42 file i maxed the WOT tcc lock up to 317 mph this is from a 2008 sierra 5.3l. The operating system is the same i didnt touch anyother tables as you can do that. You wont see the changes as i did them in Tunercat then converted to an EFIlive file

 

So you think if i did a full OS flash of this tune it might work?

 

Watch between frames 510-550 you can see the rpm drop again

 

They're doing exactly what this guys Tahoe is doing, watch video on post #12

https://www.performancetrucks.net/fo...-stall-502920/

 

I'm glad to see I'm not the only one with a problem lol

 

I believe the thread below on the EFILive forum is discussing the converter locking @ WOT issue.

Converter Locking @ WOT, why - Page 2

I'm updating efilive to see if the parameters are available on my t42 os yet.

 

Latest efi update:
{D2204} TCC Apply Speed - Second Gear, WOT
{D3204} TCC Apply Speed - Third Gear, WOT
{D4204} TCC Apply Speed - Fourth Gear, WOT

 

Interesting thread. Let us know if there's a updated OS with that patch.

I'm kinda curious if I can use the DVT controls in the scanner to over ride the TCC lockup and see if it still Trys to lock