4l80e issues

[Nemesis RR]

Any update here? You can go into the force motor tables and see if excessive pressure has been specified at 0% TPS. If the lock up clutch were engaged, the engine would stall abruptly.

As for the converter being junk, it's a possibility. It;s also possible that an excessively tight converter was mis-labeled as 2500. And 2500 is too tight for an engine with the torque curve of a freight train. But some TCU diagnostics are in order before tearing into the drivetrain.

I say it is the torque the car is putting out as well. I have a 2800/3000 convertor on a worked ls2 and I get a little creep.