So after i put in a stock motor into my 00rs a week later problems occur. Now there is a loud knocking sound while my car is in neutral but goes away when i press on the clutch and when i step on the clutch, the pedal rattles heavily. Drives and shifts fine but has a grinding sound when i shift and after 4k rpm. I am sure its the throwout bearing b/c i did not replace that when i put the motor back in with a new stock clutch. Thowout bearing is a SPEC one. What do you guys think? LMK...Thanks in advance...