My 2013 F150 FX2 makes a clunk noise when I am fully stopped and then accelerate, whether slowly or faster. It doesn't make the noise any other time except at a full stop. Shifts into 2nd - 6th gear without noise or issue........
I've read one related post about it possibly being lack of grease on the slip yoke. Is it worth fixing if that's the issue? It's more of an annoyance than anything, but I don't want it to become a larger problem in the future.

 

I'm new here too, but I'm thinking this might be better posted in the appropriate year sub-forum? As for your problem, hope you get it sorted asap!

 

Agreed. I made a new post in the appropriate year forum........

 

I have a 23 tremor and it’s doing the exact same thing!!! Can’t figure it out. Have you had any luck with the dealer ?