Common enough, that Ford felt they needed to inform dealer service about it and create a kit for dealing with it.
Good to know! And thanks for bringing it to the attention of the forum.
Jim,
Lil'Red is a '87 F250 HD, 4.10's, 1356 4x4, Zf-5, 3G, PMGR, Saginaw PS, desmogged with a Holley 80508 and Performer intake.
Too much other stuff to mention.