Reckless95z

I have a 1995 camaro M6, i recently pulled out the transmission because i lost my second gear I sheared all the engagement teeth on it. While i was in there the broken teeth took out a few other gears synchros blah blah blah so i finally got it back in i was driving it and i heard this really faint noise. At first i thought it was the rear. When i coast in any gear , foot off the gas i hear this whine every gear if i put my foot back on it goes away only when im coasting i hear it, also if im coasting and i push the clutch in the whining goes away also. Please help

Thanks
Mike