2010 A6 Corvette Transmission issue after flash

[STAGEUP]

I have a 2010 Corvette that I am having trouble with. After flashing the new tune into it, the Trans does not shift properly. Upshifts are erratic, and it will not downshift at WOT. Also, when I try to manually shift the trans, I get an "X" in the heads up display and it will not downshift in manual mode either. All TQ Mgmt is still enabled in the TCM. I played around with the TQ Mgmt on the PCM side with no luck. Anybody ever seen this before? Thank you for any info

Mods are

ECS 1500 Bower kit
Custom bower cam
800cc injectors
Meth
Bolt ons
stock trans

[5FDP]

Post the tune/logs.


What was done to the tune prior to this happening? Were those mods already on the car and you flashed it with a new file with minor adjustments or did you smack it changes for all of those mods listed at once??

[13qtr]

just throwing this out there.. was this the first tune? when I had my 09 g8, on the first tune..you had to pull the tcm fuse for a minute or two, or it would not accept the tcm part of the tune.. saw another g8 do the same thing.

[STAGEUP]

Thanks guys. I will post the tune in a bit. Odd thing is, It took the TCM tune like any other car normally does. After this happened, I flashed the stock TCM tune back in and got the same result. No gear downshift at wot, and paddles do not work. All I get is a "X" in the heads up display when I try to downshift manually.

I've tuned lots of A6 Vettes in both N/A and FI combos before, and never had an issue. Weird

[G8-4-speed]

I have had issues with the vettes loosing trans shift function and manual control if you change the "Max Torque" stock value under traction control in the engine side of the tune.