What can cause shutter in 1998 f-150 4.6 4x4 4r70w when slowly accelerating?

 

Usually, it's not the transmission but rather a low-grade misfire.

There are dozens and dozens of previous threads on this symptom.

 

There is no code being shown could this still be a low grade misfire?

 

I had a misfire that wouldn't always through a code. It was caused by a loose plug wire that was shorting out on the block.

 

Your issue will be hard to pin down without some effort to ID the cause before replacing parts on a guess and a hope..
Best to have a shop use a Scanner with capability to look at mode 6, test 53.
This looks at all the misfire monitors 'records' for each cylinder.
Looking for the one or ones with a high count as the cause of the misfire.
The reason you may not see a CEL indicating a code (that would be to easy)
is the misfire goes away and the temporary record is cancelled that would generate the code after the misfire clears each time.
Good luck.

 

Yes, it is very common. See BG7's advice.