Ticking ticking on front end

Whenever I'm coming to a stop I hear a ticking
noise that sounds like it's coming from the front
end on the right side. I took it to a Ford dealership
and told them about the problem and they said my
drive shaft needed to be lubed. After leaving the
dealership I still hear the knocking and Ticking and
it continued for the next two weeks until I took it to
another automotive shop and they said that
everything on the front end looked tight they said it
wasn't a ball joint they said it wasn't coming from
the brakes and that they didn't know why it was
ticking. The grease the ball joints and the
suspension and after I left the automotive shop the
ticking still occurred. What is going on with my
truck?