On a burnout, the converter pump seal came right out of the pump. The seal itself looked fine, but it pushed right out of the pump housing. Needless to say, there was a serious trans fluid gusher.

I think that I had the trans a little overfilled as there was some fluid blow-out from the vent on earlier passes, but not a lot. I wonder if foaming the fluid could cause the seal to push out, or if it just was not installed right? Anyone seen such a thing before?