Clunk at low speeds

[xTOM153x]

I still haven't figured out how to recreate this problem it sort of happens on its own but whenever i come to a stop around 10-15 mph i'll get a large bang that sort of feels like it wants to push the truck foward from what seems like maybe the rear diff maybe a clutch pack i have no clue

 

[Curtis]

I have a similar problem
When coming to a stop, just before get to a complete stop, I feel a clunk or pop
Sometimes I will get to a complete stop, but as soon as I release the brake to go, I get the same pop.

Ford said it was my slip yolk in the drive shaft, but my extended warranty says its not bad enough to replace.. go figure...

A used driveshaft around here is about $100... so if its not worn enough to replace by the end of my warranty, thats what I'll do.