[Dean Feiock]

Most likely to much cooler/lube circuit pressure. Good converters don't really balloon, but excess pressure will force them forward off the stator support. A common problem on some transmissions with a high fixed line pressure.

Tee a pressure gauge into your cooler lines. You'll want no more than 50 PSI at stall speed. Anything over that needs a restrictor installed. With a fixed line pressure in the 150-175 range, a restrictor with a .094" hole is a great place to start.