Been driving dad'* '95 Ford F-150 for the last 4 months with what I assume would be the E4OD Transmission, 4-Speed Auto.

Today I drove down to the school Campus and everything was fine. Then went to My grandparents house, again everything was fine. Then back to class; when I noticed the Overdrive light on the shifter was flashing. I thought maybe it i hit the button or something and I pushed the overdrive button and it keeps flashing, so wtf. I continue to drive and it seems like it took longer for the 2-3 shift. Then going 55mph it should be running at 1600rpm but its running more like 2400rpm. So now it seems like it needs another gear. So I can't quite tell which gear its skipping/not shifting to. Either its skipping 3rd or not shifting to 4th(overdrive).

No other signs really, except i hear what could be a grinding noise (like loose pieces in the trans) but its kinda faint and I only seem to hear it in reverse and what seems to be the 2-3 and 3-2 shift/downshift. No other sounds, no vibrations or shuddering, hesitating or anything. Trans Fluid is at a good level, doesn't seem to look burnt or smell burnt.

Dad put a scanner to it and just cleared the codes (Without writing them down) so we don't know what specifically was wrong. But clearing the codes seemed to work for about two weeks. Now the trans is starting to slip coming out of overdrive.

Found out on the F-150 Forums that a couple weeks ago when I thought I had lost a gear, what it did was it detected something wrong and put itself in 'safe mode' to try to protect itself. The guys over there said it has to detect the problem each time the truck is started but when it was doing it it found it in halfway on my way to class and every time after that it did it immediately after turning the key.

It hasn't gone into it'* safe mode since clearing the codes but it has been driving fine till yesterday I it seems to be slipping to come out of overdrive. And it seems to take a few seconds longer to engage revers after selecting it on the column.

:?