I had the same problem w/ my 241. A buddy of mine who rebuilds trannies said that the problem was a bad design at the factory. Apparently the seal faces are smooth and don't hold a seal well. His remedy was to throw out the gasket, scibe the faces in the middle of the machined surface (for a place for the silicone to grab) and orange goo'd it. It fixed all of the leaks except one. But that's a crack in the case. Eventually I'll get that welded (when it's warmer out). This is for an aluminum case. Will it work on your cases?? Don't know, but it's worth a shot.
Why do people keep calling it a Bronco!!!!!