So about a month ago I bought a '04 Explorer Eddie Bauer with the 4.6L at an insurance auction. It was clean, in good shape and looked like it had been taken care of and the Carfax came up clean. I wasn't able to drive it, but all the electronics worked and no codes showed up on a scan. Being that this is my first Ford, I was hoping I didn't buy an acronym - Fix Or Repair Daily. Needless to say, I get it home and the first thing I notice is the tranny slipping and occasionally shifting hard. After doing some research and looking at the carcomplaints.com website I realize that this is a common problem. I bought a Haynes manual and found out that I need a special tool to check and refill the tranny fluid since Ford and their brilliant engineers decided to create a 'sealed' tranny. Not having the adapter, I took it to the local Aampco to have them replace the filter and fluid to see if that would make a difference. That was a waste of time. ******** customer service guy tells me its shifting hard and slipping, the fluid smells burnt and there's no point in changing the fluid. And they wanted $600 to do a 'diagnostic' tear-down. Where are my keys! So I realized I had to get dirty and finally ordered that fluid fill adapter ($20 for screw with a hole in it) and got some fluid and replacement filter. Drained the pan, got maybe 3 quarts out. Replaced the filter, put it all back together and started pumping in new fluid. Started by pumping in 2 1/2 quarts cold to get some fluid back in the pan before starting. Followed the Haynes manual to the letter, starting it up, running through the gears and checking the flow. At first nothing, so I added another quart. Pan is now warm to the touch, so the temp should be close to the right range. Still no drip. Added another quart, still no drip. In total, I put in about 6 quarts before it started to drip, which according to the manual is the tell-tale sign that it's at the right level. I'm guessing that whoever owned this previous, must have checked and added the fluid cold. When I replaced the engine oil, it had the cheapest filter I've ever seen...might as well had just said 'oil filter' on the side. Maybe the quick lube guys the previous owner took it to didn't know how to properly check the fluid and let too much out. It now shifts just fine. Fluid was not burnt, just the normal stinky tranny fluid.