Hey all, me again, apologies if I'm posting too much or the wrong way, not very computer savvy, but I'm rather curious about what my 98 f150 is doing.
It has the 5.4L (Vin L) with the E4OD and whenever it goes into overdrive it shifts a bit funny.
Not sure if it's temperature related, sensor related, torque converter related or pressure related.
I'll post a link from YouTube showing my "situation" and hopefully anyone here will have more knowledge and possibly answer or put my worries at ease.

 

Watching the tach, it looks normal to me. Is it shuddering or something? Please describe "a bit funny" to you. If it is cold outside, it could be shifting a bit different than normal because it has a cold weather strategy. Mine (4R70W though) most definitely shifts different when it is cold out.

 

When I say a bit funny it feels like it only starts to feel odd once it's warmed up.
Like it it'll spend a normal amount of time in 1st, then shift into 2nd normally then kind of rush going from 3rd to 4th and when it shifts from 4th for Overdrive the tach looks like it hesitates. Typically it'll shift with one consistent motion but when going into overdrive if you look closely it looks like the tach hesitates halfway through the shift.

I hope I'm explaining this correctly, it's hard to put into words.

 

It looks to me like it may just be your torque converter going into lock-up. My experience with E4OD's is with Powerstrokes, and they are a bit different. I'm sure JBrew will chime in, as he has a lot of experience with the E4OD in these pickups.