Actually I've used the Permatex/Locktite tape a lot, but like the factory rep said, you have to start it a thread or two back tapering the windings, and most importantly, wind it on in the proper direction so it stays put. Been a life-saver winding it on thick on certain worn out sloppy hydraulic fittings.
Heavy truck and diesel mechanic (thankfully retired after 30+ yrs)
'91 F-250 SC 4X4, 5spd. ATS Turbo, 3:55 diff.