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I'm starting to side with you, fully_loaded. I put a torque converter cancel/applied switch on my truck. We might be able to do that with this to see if the torque converter is locking up.
Basically theres a wire that leads to the solenoid block in the tranny. I cut that in two, and extended the wires up into the cab of my truck. I then took another wire and secured it to a ground, and then put it on the last terminal of my switch, with a jumper to the "output" wire leading to the tranny. One switch position is locked up, another is unlocked, and the 3rd is computer controlled. This method was used for many Dodge truck owners who had problems with their torque converters locking up when not supposed to, or not locking up at all. I just studied some wiring schematics and applied that same method to the E4OD transmission.
Yeah, it seems like something doesn't release all the way or something and it is causing it to kill. I don't know if it is the torque converter or some clutches inside or what. I've had all the sensors double tested and everything is fine on that end. I just don't know...
I agree. The forward clutches locked up in my other E4OD, and they didn't react the same way you're describing. The only difference was, it was like you were in drive all the time. When the shifter was in reverse, it would fight itself. When it was in park, it wouldn't move. In nuetral, it would move forward.
Nonetheless, I'm leaning more towards a torque converter issue, just as Fully_Loaded is.