"funky" seat belt

so maybe 18 months ago, when the drivers automatic seat belt way moving in its track...a fiberous strip of some sort came loose and almost fell out...it was a thin strip and a little greasy (i dont think this is the source of the problem below but mentioning it anyway)

 

I took it out and all was fine

Recently,,,,when the belt moves all the way into position (door closed engine on).....it sometimes chatters while sitting there and will keep on chiming (ringing)....as if it cannot seem to lock into its exact posiition (you can also here some kind of control unit chattering under the rear speaker deck)

 

If i just hit the mechanism with my hand in a downward motion it stops

Sometimes when i move around in the seat too harshly...it starts it doing it again

 

not sure what i can do to fix it?

Edited October 19, 201114 yr by bgambino
grammar

I've got the whole mechanism it is already removed from the car works good. pm me if you want a price quote shipped..

I have working mechanisms for both sides too.