When releasing clutch (in first or reverse) ticking noise. No effect on performance

Hi. When I release my clutch pedal in 1st or reverse, my truck is making a clicking noise. This doesn't happen when I release the clutch in neutral. It is not effecting my driving but I want to know if anyone has had this happen or knows what may be causing it so I am prepared for a future repair.
Thanks

 

Noises are so very tricky .

Is the noise loud enough it attracts the attention of people within 50' to 100' that they turn and look.

It can be so very many things as your starting from a stop.

loose exhaust supports , heat shields , internal muffler parts or loose suspension or engine mounts.

 

Its not loud at all, I don't think you would hear it from 10 feet away. I can feel the ticking though. I figured it has something to do with the clutch or maybe the throw out bearing since it only happens when the clutch is released and the car begins to move. Thanks for the ideas if it gets worse I am going to spend more time figuring it out.