[valtiel43]

I just got a 1978 Camaro, built mainly for the strip. It has steel sidewall Hoosier slicks on the back. Not sure of the exact size, but they are 12 inches wide.

I've never had any experience with slicks so it's all new to me. The car is running a 350ci sbc, making about 400rwhp, a 350 turbo auto, and 3.90 gear in a 10 bolt rear end.

I was out driving it for about the 4th time today and noticed when I let off the gas I'm getting a loud buzzing/whining sound from the rear of the car. I thought maybe it was the tires rubbing the frame but they have clearance. Then I thought that maybe it's just a noise that slicks make? There's no noise on acceleration, only when I start to slow down. It's kinda loud too. Could it be the slicks making some road noise, or possibly something in my rear diff.? Aside from that the car runs great and it's super fast ( for me it is, even though it only runs a low 13, lmao).

This is probably a super noob question lol but I don't really have anyone else to ask. And like I said this is my first experience with a car setup for the strip.

[valtiel43]

Ok I just took it out for a drive and took a video so you can hear the sound. It wasn't this bad before. I got on it a little earlier, not much, but it seems like it started after that.

Here's the video:
http://www.youtube.com/watch?v=LgD8u3bFUfA

It doesn't happen at low speeds up to about 25mph, but then it starts as soon as I let off the gas. And it gets louder the faster I'm going. Then as soon as I give it the slightest bit of throttle it stops. Then starts right back up when I let off the gas until it gets down to about 10-25mph then it goes quite.

[SSedan64]

Pinion Bearing or the Coast side of the Ring Gear whining. Doesn't sound good.

[tnsmith10]

check the pinion nut, make sure it hasnt backed off