Quote from bking on July 6, 2020, 3:46 pm

I have a 1986 buick regal that i recently put a new rebuilt lq9 with procomp heads and a summit ls stage 3 cam 600" x 600" 113+3. it has a Fitech 70007 system on it with a 4l65e transmission with a 2400 stall converter. I am on my 2nd transmission as the first one lost 2nd gear and overheated. I am not trying to do this again. I just installed the new trans the past couple days and now it does the same thing as the first one. it does not shift under hard acceleration or wot. i did a couple of data logs and now im not sure whether its engine or trans related. can someone help. i have emailed Fitech but I have not heard back from them yet. i have attached data log file. here is also a youtube vid i did.

https://youtu.be/g-ctVlGDK-U