I'm really confused. HALP?
 

Ok so I'm reposting from the manual transmission forum. I'm hoping maybe some of the engine guys might be able to give me some solid help, as well as the transmission guys. So,

I need help. I have an 01 SS. I bought the car a while back and noticed a sound shortly after I bought it, it has a tapping sound that increases/decreases with the RPM's. The only way to get the tapping to start is to sustain higher than 1600 RPM's. It doesn't happen on acceleration. If you downshift going down a hill, it will start. The sound will stop if you let the car idle for a minute or so. My first thought - valvetrain. I rebuilt the entire upper end. LS7 lifters, comp hardened pushrods measured to spot (7.400). Manley valves, dual valve springs, trunioned rockers, and a TSP cam. All done by RPM motorsports. After getting the car back, I still had my tapping sound. I brought it back to RPM and they put it on a lift. They concluded, and showed me, that it was coming from the bell housing. So...I replaced the clutch. Full clutch kit, Monster stage 3, tick hydraulics, new flywheel, the works. IT'S STILL THERE. One last thing about the sound. It will still increase or decrease with the RPM's if you press in the clutch and rev the engine. Ok. Ideas?

Sorry for the repost. Just trying to cover all my bases. Thanks guys.

If it does not do it on acceleration but does do it on de-acceleration that that screams to me a clearance or a worn bearing issue in the transmission. What transmission is being used, T-56? Could check for input shaft endplay, that is where i would start.

Its an m6. My transmission is freshly rebuilt also.

Heres the noise guys. This is my car. Mine does the same thing as his

Rolling at 70 or so down the hwy..windows up
http://youtu.be/JLq5MU06P3k