Do a fluid change and cross your fingers . Anyone I know that did a fluid change on a trans that had had the fluid changed in over 100k miles or decades was doing a full trans rebuild soon after .
Yep RR, that's what I'm concerned about. Agree, overall with SlantDan but was told years ago by a Transmission guy that high mileage trans should not use all new fluid unless they are completely rebuilt. Have always remembered that so in a quandary now. Does not feel right to keep running it with old fluid, but will be really ticked if new fluid takes me backwards! That's why I'm leaning towards an in between route and new filter...