Someone out there doesn’t happen to know if the 4L80e uses the same converter as the 700? I know that the 700, 350 and 400 all have 30 spline inputs and that you can actually use a 700 converter on a 350c and 350 and 400 converters interchange, and since the 4L80 is really just a 400 with another planetary set I’d be surprised if it had a different input spline count, but I can’t seem to confirm that.