I've got the tp filter and the internal filter. I just thought the change on the 5r110 would be as easy as it is on my 99 with the 4r100. But after spending a lot of time looking at things...it doesn't appear so thanks to the internal thermostat on the 5r110. Looks like my only options are...
1. drain tranny pan, fill with 7 quarts of SP, repeat process a couple more times to get the majority of the fluid out. After the last drain, take pan off and replace internal filter and then replace aux filter.
2. drain tranny pan, take pan off, replace internal filter, replace aux filter, put tranny pan back up, fill to full and call it good.