ATF transmission oil (red color) accumulating between the transmission body and the extension housing. This is where the 5th, 6th and reverse gears are located. This is caused by a failed RTV seal, and the only way to repair this is by removing the extension housing and resealing the flanges. The failed factory RTV sealant. The earlier effort to seal the leak from the outside was only a partial success, but who wants to remove the transmission only to repair this leak? The magnets trap metallic particles produced as the transmission wear (or fail), which would otherwise be circulating in the oil and cause further wear. I wanted to remove the magnets to clean out all the particles, but I had to use more than sensible force, so I cleaned them in place. I found no large particles or shavings, only fine metallic dust that disappeared into the cleaning cloth. A good sign. Another source of oil leaks are the inner and outer rear seals of the extension housing, so I changed these too. If you