Knocking noise

If clutch is tite and good and you only hear knock when depressed,it may be bad throw out bearing,or pilot bearing issue,

The throw out has been changed 3 times the pilot bearing was new just last spring along with clutch and pressure plate I have a hydraulic clutch

Did you bleed it properly?

It really sounds like a knocking like I at first I thought rod knock in motor but in neutral the motor is quiet and runs great

Yes everything works beautifully shifts and runs perfect just that knocking when clutch pushed in its more noticeable at moment clutch goes in to drive

I was thinking either pilot bearing or the bearing on the transmission shaft behind my throw out maybe the bearing is bad enough it vibrate s

Have you taken the inspection cover off and looked for any wear marks that may be causing a noise? Rubbing. I myself would block the truck up real good, get someone you can trust to operate the clutch, crawl underneath with the inspection cover off and see or try to pin-point what is causing the noise. (knock)

you might want to check the flywheel for a crack.