Hard shift.

[OneTon]

Was driving my 08 last night, that has 1300 miles on it, and while it was shifting between 2nd and 3rd .. it seemed to almost slip ... or miss the gear then slam into it hard. I was very easy on the pedal. Its an automatic.

Has this happened to you before? Is this a known issue? Or am I being paranoid?

[DavidPhillips]

I have found it better not to be "easy on the pedal".

You might mention it to the dealer, maybe it needs a re-flash.

[Cory S]

my brothers tranny went out at 4200 miles the dealer rebuilt the whole tranny

[2005F250]

Mine does this. I'm a 6.0 guy but mine has done this since new. Last tranny slipped, 2-3 shift problem, peg rpm's between 2-3 shift and break tires loose with a slam into 3rd, and it was starting in 3rd from a stop. Turns out 3rd gear clutch packs were toasted and some other things were busted. Truck was stock minus exhaust. Right now I'm having the 2-3 problems pretty much every other shift with a new unit.

[ezzrider]

I realize it has been awhile since this original post but - I experienced a similar situation exactly like what you are describing when I had around 4,000 miles (don't remember exact mileage). My 6.4 seemed to slip gears and then slam into gear going out of my driveway. I thought my wheels may have slipped on sand. I then got a service error on my dash. I turned around and went back into my driveway. I shut off the truck and when I turned it back on the error message was gone. I went back out of the driveway and went less than a mile and started having problems. I drove back to my house and called the Ford Dealer. They had my truck towed in to the dealership. Long story short they wound up installing a new not manufactured (as it should be) transmission. They provided my a rental vehicle while they fixed my 6.4. This was at Brandon Ford in the Tampa, FL area.

[2005F250]

So others are having 5R110 issues. Same issues as all of mine.