Alright, I'm still trying to wrap my head around this converter issue.
I'm not doubting it's the converter, so let me say that right now. I have questioned this community before and was wrong, lesson learned.
I'm trying to understand why it is doing what it's doing. Shudders/vibrates when you accelerate around 65-70mph and does not stop whether it's the heavy tow, 90, or 150 tune. No symptoms, that I can hear or feel, when on the optimized stock. Here's were I get kinda confused:
I hooked it up to a tech 2 and went for a drive. It didn't matter what tune I used, where I was for speed, or what rpm I was at, I could not get the shudder/vibration to happen. I got it out on the highway, I passed vehicles (usually when it happens), and nothing.
Why doesn't it do it all the time? I'm still not getting any codes, though I have basically left it on the optimized stock tune since it really caught my attention and have tried not to beat on it.
What exactly in the converter isn't working? Does it have to do with the clutches? What about the flex plate, could it crack?
Any insight would be appreciated.