Put a temperature gage on your tranny. I bet you are boiling the oil because of overheating. My 400R4 had a badly undersized round finned 18 inch oil cooler installed inside the frame by my builder. He did not want to run tranny oil through the 40 Ford radiator, so on hot days in stop and go traffic and at parades, it would boil over and down onto the exhaust, causing a lot of smoke out the back. Since I did not want to connect the tranny to the radiator, I ended up buying an electric fan cooled remote oil cooler, mounted in front of the rear axle, not wanting to add to the heat in front of the AC cooler in front of the radiator. Seems to be working, but I have yet to drive it in stop and go traffic on a 110 degree day. I do have oil temp sensors in the oil cooler line, and air in the remote radiator bo, to keep tabs on it.
Edited Mar 17, 2018 at 1:57 am