hi guys, I have a twin turbo c6, circle d trans and triple lock circle d converter. recently was referred to a website because circle D who provided the tune for my transmission a few years ago no longer does tuning. my car shifts as it should however, I recently took it to an airport race and the converter was set to lock at 85mph in third gear and then shift to 4th it would unlock and then lock up pulling the rpms down.
two items I need help on: 2006 C6 2.56 diff, 6l90, 3200 stall, 15psi twin turbo
1. how can I keep it locked thru the shifts 3-4, 4-5.
2. what would be the ideal mph to lock it at. car added 6 mph in the 1/2 mile just by locking it in the log attached.
thank you!