So the car had low end Richmond gears. All I did was swap out that rear for the stock gear. The drag gears never made a noise when it was in the car before. I put in a brand new 7290 axel yoke kit and a brand new drive shaft that went right into the transmission. Everything installed perfectly. Around 30-40 mph you start to hear a whine that disappears around 70mph. That's when the ringing sound happens. It will go away and come again every 30 seconds or so. Once I back off the gas a bit, it goes away.