I lost overdrive and possibly 3rd once it shifts out to drive it goes into neutral. down shift or turn off overdrive it takes off. 55mph = 3000rpm oil slightly discolored. Pulled valve body down overdrive servo intact with snap ring good. nothing in valve body. no check engine light or codes......any ideas just guessing 3rd and 4th clutch pack piston or drum? Anything else it could be before i pull the trans

 

I'd say you are done. Time for a rebuild.

 

That's what I'm thinking just wanted some feedback not knowing any other common failures that I could look at before pulling it

 

Nope. I'd pull it.