Just started the other day about 70 mph on slight uphill, the trans was having trouble staying in OD, shifting and revving. It's got about 165 k miles on it. I check fluid and needed a pint. It seems like OD might be going from searching here. We have an OBD code scanner, but haven't tried it yet because I'm recovering from a painful lower back issue.

It's been serviced a couple of times, but suffered some lead foot in it's time.

Thinking about a used one, or maybe a rebuild or solenoids or whatever 'cause I'm not sure what's wrong. Money's tight as usual.

Thanks for your suggestions!