I've had a couple 5R55's in explorers and I learned the hard way that heavy throttle 5-3 downshifts kill these transmissions. I did a lot of 2 lane highway driving and lost a transmission in my 2002. After reading about many failures in mustangs caused by a 5-3 downshift, I adjusted my driving to click off the O/D with the button and then get on the throttle to pass. My 2005 had 230,000 km when I sold it and the fluid never had a hint of a burned smell and the shifting felt as good as it did when I got it.
I'd do a pan drop and a filter change on the transmission and make sure you have the correct amount, I didn't put enough fluid back in when I did a pan drop and it shuddered until I added more.
I'd do a pan drop and a filter change on the transmission and make sure you have the correct amount, I didn't put enough fluid back in when I did a pan drop and it shuddered until I added more.