I was tuning a friend's gxp yesterday and I noticed I could not log the vehicle speed on the VCM scanner. I tried adding the channel and nothing. All speed channels added from TCM and ECU and get nothing.
Another problem is before I tuned the car sometimes it would not shift into 3rd and instead just stay at 6k rpm until you let go of the gas pedal and then it shifts. After checking all the tables and adjusting shift points it will still do this randomly. I made sure all the shifting speeds match from table to table. I noticed it only happens when in competitive mode though. But last night it did a new one at wot without comp mode, the car took off from a dig and as soon as it reached 60mph the car did not shift or accelerate any further. It was as if the was a speed limiter at 60 mph. I removed all limiters prior to that so no idea what is causing the issues.
My laptop was low battery last night so I don't have a log but today we are giving it another go and will log hoping to get the issue logged this time.