I have a 1998 Ford Expedition with a 4R100 Tranny with 140K miles. It has been dealer serviced at 60K and 90K using Factory Spec XT-2-QDX.
Now I want to change the filter and fluid and cannot find Ford or Motocraft Mercon XT-2-QDX.
I have spent days reading reviews and talking to Ford dealers.
Original spec says DO NOT USE MERCON V, otherwise serious damage will occur. Now Ford says that Mercon V is the new spec and has TSB to back it up. But I have read posts that the damage will not occur for for 30 or 40K miles. Did Ford change the formula in the Mercon V so now it is compatable, or are they selling what they own?
On top of that I read, not to mix Mercon and Mercon V, so I am concerned that even a flush will not get rid of all old Mercon and that power flushes on high mileage transmissions are also very bad.
I feel like using and aftermarket Mercon/Dex3 is the safest most foolproof option, but then which one?
Anyone with any experinces good or bad regarding this subject?
Now I want to change the filter and fluid and cannot find Ford or Motocraft Mercon XT-2-QDX.
I have spent days reading reviews and talking to Ford dealers.
Original spec says DO NOT USE MERCON V, otherwise serious damage will occur. Now Ford says that Mercon V is the new spec and has TSB to back it up. But I have read posts that the damage will not occur for for 30 or 40K miles. Did Ford change the formula in the Mercon V so now it is compatable, or are they selling what they own?
On top of that I read, not to mix Mercon and Mercon V, so I am concerned that even a flush will not get rid of all old Mercon and that power flushes on high mileage transmissions are also very bad.
I feel like using and aftermarket Mercon/Dex3 is the safest most foolproof option, but then which one?
Anyone with any experinces good or bad regarding this subject?