I posted a question in a different thread about the drain fill using merc v in an 05 limited, thinking mercron was no longer available.So now my question is :If mercon is available should I stick with that ,and if so would you recomend a brand ? ThanksSquishy said:Oh, a "transmission flush" definitely can hurt. Any sort of chemical flush, back-flush, or high-pressure flushing procedures should be avoided on higher mileage transmissions.
A few years ago there were a rash of transmission failures after adding Mercon V to a CD4E transmission originally filled with Mercon, although Ford claims to have fixed any incompatibilities with a new formula. Since you're experiencing problems after a flush, I would immediately switch back to Mercon. The dealership will only put Mercon V in, as the Mercon licences have expired and that fluid no longer exists as far as Ford is concerned.