What is this hellacious noise???????

[Dan Sherwood]

I've had my tko 600 in the 69 camaro now for a few weeks and today on the way home from Phx I started to get a whine around 78 mph that grew into an all out scream getting up around 85 mph. Having just changed gears in the car I thought it might be coming from the rear but when the noise let loose it sounded like my radio speakers blew. After turning the radio off it made no difference, and after backing off and then slowly creeping up to speed again, it appears it's coming from the trans itself. Any ideas? Also-I'm getting a nasty gear oil smell inside the car, even though I don't really see any drips on the garage floor. One other item is the bucking back and forth like you'd get if rolling up to a stop without pushing in the clutch. It will do it at 45 mph when in 3rd or 4th and also in 1st or 2nd at 10-20 mph. I was hoping the 4.10 gears would solve this, but so far it has'nt. Help?