So I purchased the Motorcraft XG-8 PTFE grease to lube the output shaft/driveshaft yoke splines on my '11 F150 4x4 as mentioned in . I couldn't source the updated white grease that comes in the kit for the two piece but the XG-8 was cheap and its fairly easy to do. Anyways, everyone says that the splines are dry on the transfer case output shaft but when I pulled mine they definitely had some fluid (ATF/Transfer case Fluid). Normal?

Also I found it a little worrisome how much slop there was in the tailshaft bushing to yoke, in fact it could rattle around in all directions just a little bit. This did go away after greasing the splines with the XG-8 but I'm sure thats not going to last forever.

 

I'm interested in this too. The dealer performed the TSB on mine but I worry it will need attention again down the road.

 

BMWBig6, it looks like you should have the two piece driveshaft. Same issue, slightly different location and the regular kit should include everything you need. The gentleman who made the above youtube also has one for the two piece driveshaft slip-bump IIRC which lists the kit p/n. I'm sure you could use the XG-8 grease, also but it is an older formula.

After driving today it seems that the slip bump has completely resolved both during off the line acceleration as well as the 2-1 downshift when coming to a stop. Still curious about the ATF/TCF on the splines as well as the (perceived) large amount of play in the bushing.