Thanks to this forum for all the info and help found here! Galcier991, BrooklynBay, and many others, thank you again!
I have a '99 Explorer Sport 4WD, 4.0L SOHC with 146K miles and 2nd to 3rd slip.
I ordered a CVB valve body and changed it this weekend...I see the SOHC is a little harder...