Last week I purchased a dc2r, 165000km on it. With clutch replaced about a year ago with exedy organic hd clutch. I have noticed a noise from the front of vehicle, sounds like a knocking/whirring/tapping noise while driving, there is no noise noticeable while stationary, clutch in our out, nothing. While taking off in 1st gear the noise slowly becomes noticeable, once you go into 2nd gear it gets louder, it seems to progress with engine speed, its most noticeable at lower rpms in higher gears for example cruising at 40-60km in 3rd/4th gear. While cruising at that speed, if I clutch in and go to nuetral the sound Almost completely goes away and is only slightly noticeable while rolling, with clutch still disengaged, if I put it into 2nd gear while rolling noise happens only when slightly sliding shifter into gear, then stops once shifter filly into gear, once clutch is engaged noise returns. . Noise differs with acceleration for example if I tap/feather the throttle it will go away/get louder/faster..

Im just looking for some advice. This weekend ill be checking and replacing gearbox oil. Could this be a gearbox problem? Perhaps drive shafts? any help would be great. I will upload a video of me driving this weekend so everyone can hear the sound. Any help would be appreciated!