This may be a dumb answer,,,LOL, but I have not changed the Dodge filter in 100k miles. I do change my pan fluid every 10k. My mechanic friend says if your transmission has worn enough to clogg a filter chances are that a rebuild is in order. I do know that a dirty filter, filters better than a new filter.
I do always change the filter at 50k and 75k miles on my newer vehicles to remove any break in metal deposits.
Just turned 186,000 on the original transmission. My daily driver, 96 Buick Regal 3. 8 has 161k miles and same filter for 80k miles.