I have a bad clunk in the driveline from a stop and I know it is the slpines or somthing and there is a TSB about it. What is the service procedure to fix this? I would like to do this at my shop insted of taking it to ford. Also will just a high temp syn greese work or does it have to be that teflon greese?

 

TSB for lubing the slip yoke.

The lubing makes a huge difference. You'll notice a little more responsiveness after the fix.

A few threads have talked about this if you do a small search