First of all I am new to this site so hello. I was wanting to get help or opinions on what to do with my 04 explorer transmission. It's a automatic (5R55S) 2wd 4.0 with 107,000 miles on it. I had the recall on the additive done for the transmission fluid when they first sent the recall out but that's it. Since being brand new it has had the hesitation and then clunk when going from park to reverse. Brought it in under warranty and they said nothing was wrong, I just dealt with it. Now after several years I am now having a slipping condition which seems to be mainly 2nd to 3rd gear. I have done alot of reading on this site the last couple of days and can't decide what my best option is. I see many knowledgable people on here with good feedback on fixes. Just not which one is best for my application. Could a fluid flush help, hurt or fix it? Could a valve body repair fix it? Could the servos with o-rings fix it? I have also looked at getting a refurbished transmission and having it installed and be done with it. But which refurbished transmission place would you recommend? Lots of companies to choose from and costs vary alot. Any help or opinions on the best route to take would be appreciated. Thanks