As mentioned before, what I have heard elsewhere is the current fix is to lube the slip yoke where it goes into the transfer case. Apparently Ford has some grease that gets along with the lube in the T case. This fix provides mixed results, some owners report it works, other report it only lasts a short while.
I had a 99 Ranger (two piece driveline) that had a clunk. Ford replaced the driveline with an "updated" version (after several lubing attempts) and even that didnt fix it.
What I find strange is that I have had several F-250's /F 350's and none of them have had any sort of driveline clunk-so we all know the engineering exists to make a non sticking yoke -spline assembly.
I had a 99 Ranger (two piece driveline) that had a clunk. Ford replaced the driveline with an "updated" version (after several lubing attempts) and even that didnt fix it.
What I find strange is that I have had several F-250's /F 350's and none of them have had any sort of driveline clunk-so we all know the engineering exists to make a non sticking yoke -spline assembly.