4L60E making noise

Alright, so this is a 1994 chevy k1500 with a 5.7 and a 4l60e. Today i was driving home from class and noticed i could hear a strange clicking sound coming through the floor. Not very loud, only noticed it while in park with the music off at idle. The clicking comes from the center of the floor right around the t-case shifter, in that area. And after laying under the truck and listening, it definitely sounds like its coming from the trans. It's doing it while in idle and the clicking goes up/down with the speed of the engine. Anyone ever heard of this, anything to worry about?
Thanks, Chris

maybe lose torqconverter bolts

well i have some good news and some bad news. The good news is that it isn't the trans. The bad news is that after closer inspection, the noise is actually my fuel injectors, and they are getting pretty loud with the clicking and it seems to be both. Does this mean they are going out? or do they just need to be cleaned?
Thanks, Chris