I would like to have my tune reviewed to ensure the tune is not what is causing this issue. I believe it is a mechanical problem in the trans. Customers transmission builder believes its a problem in the tune. We have agreed to have the tune reviewed to see if I have missed something that would cause this issue. Transmission was just recently rebuilt and completely gone through. See list below.
Tune file and log attached
GTO Tune 3.hpt
WOT Log Trans Slip.hpl
Symptoms:
Normal driving the transmission shifts fine, all the way through the gears. Under WOT acceleration it chirps on the 1-2 shift, but on the 2-3 shift it slips and will not grab the gear. Let the rpm drop back down and try to continue in 3rd, and it just acts like it's in neutral. Slow down and let it down shift to second, and then back up to 3rd at partial throttle and it does OK. It's only on high load in 3rd. If I command 3rd gear and floor it, trans slips.
2006 GTO LS2
Texas Speed Cam
228/232 0.600/0.600 112
Dual Valve Springs
Longtube Headers no cats
Stock TB
Has an upgraded filter, stock MAF
4L65
3200 Circle D Stall Converter
Trans was rebuilt using some upgraded components.
Trans has heavier pressure reg spring, 9 3-4 frictions, corvette servo, HD load release spring, larger hole size in seperate plate, stronger 1-2 accumulator, etc.
Please review the trans tuning and tell me if there is a problem with it that could cause such a condition.
Thank you