Speedometer, High RPM/Speed whine, High HC's 88 N/A

[Isphius]

And as for your rear end whine, Def sounds like a driveshaft bearing or your rear diff bearings. Maybe even the rear end fluid. Change it out and see if it helps. And if not, Replace all the bearings. Could be your trans tailshaft and/or bearings too. If its speed related its def the trans or back. Get your car on a lift and check for play and check it out to see if anything looks wrong or out of place.