Ford Windstar transmission seal



I have a 2000 windstar that was leaking tranny fluid. Ford says it’s the torque converter seal BUT recommends that I also replace the converter the same time as the seal. Is this really necessary?

Would this cause the van to make a ‘kind of’ clunking noise when it comes to a stop?

I asked them if the tranny was “sound” other than the leak they said yes. Is there a certain test I should ask them to perform to know for sure?

I don’t need the vehicle forever just something to use on weekend trips so I can give the 93 camry with 200k miles a rest.