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joecar,

Thanks for the info - makes sense.

gad

Thanks again.

I did make a quick pass through the V7.5 Tune Tool without finding a way to turn that "auto release/lock" function on and off. I will look again.

Some time ago, I considered...

Tre-Cool,

Thanks for the response.!

In this OEM tune, the 4th gear lock speed is 37 MPH at all throttle settings. The 4 to 5 upshift, at 50 % throttle, is at 86 MPH.
Do I understand that the...

Included are two OEM tables from my 2011 CTS-V: the Part Throttle Shift and the Normal TCC tables.

I constructed the third table in trying to understand how the system works.

"Lock - Upshift"...

Thanks Paul - problem solved on W10. I will also update my W7 Pro system which has the same problem.

Although very new, I had V7.5 293 and V8 286. I thought I had checked for updates, yesterday...

I am having the same problem running under Windows 10. Every file I modified causes that message when I try to open it under V8. Each of those files can be opened under V7.5.

Please share your...