I was taking the Vette out for a weekend drive and noticed a problem.
After about 2 hours of driving, the rear driver side wheel started to make a "grinding/squeeking" noise.  I brought her home and let it sit for a few hours, took it back out to analyze the problem...and it had gotten better.  Instead of squeeking/grinding all the time, it only happens when you get on the throttle.  This varies between acceleration rates (ie. it will grind at slow acceleration one time, and only at fast acceleration other times).   Any ideas??

No vibrations noticed.  No difference in the handling.  I've cleaned the brake rotors and calipers...still making noise.  I know that my parking brake needs adjustment (it doesn't stop the car from rolling forward, and barely stops it from rolling backward). I'm stumped.

You should check out your rear wheel bearings. Jack up each side and check to see if there is lateral movement of that wheel.

checked that. I jacked up each side, grabbed the tire at the top/bottom and left/right sides...very little to no movement.  I am going to try and adjust the parking brake to see if that helps.  any gotcha's with that?? 

Sounds like a U-Joint going out.

A "grinding/skweeking" noise in the rear is usually a wheel bearing, whether there is play in them or not.
Of course, it can also be the park brake, so check all of the easy stuff first.

Okay.  So here is what I've got...  I'm going to appologize for the long post, but I want to be as detailed as possible in the hopes that someone who is more mechanically inclined/experienced can help me out...

    Usually a wheelbearing will make noises all the time. It will change according to speed. I loud clunck seems to me like a uni joint - maybe. With the car on the ground and in gear, crawl underneath and try to rotate the half-shafts with your hands back and forth. If the uni's are tight, there should be little or no movement. If the movement seems to be more than you think it should be, I'd have them checked out further. Have you tried to feel the hub after driving for awhile? if the wheel bearing is bad or going bad, there will be an excess amount of heat right at the spindle area.

[QUOTE=78SEvette]    Usually a wheelbearing will make noises all the time. It will change according to speed. I loud clunck seems to me like a uni joint - maybe. With the car on the ground and in gear, crawl underneath and try to rotate the half-shafts with your hands back and forth. If the uni's are tight, there should be little or no movement. If the movement seems to be more than you think it should be, I'd have them checked out further. Have you tried to feel the hub after driving for awhile? if the wheel bearing is bad or going bad, there will be an excess amount of heat right at the spindle area.[/QUOTE]

The trailing arm bushings could also cause a clunk on take-off, as could the front diff cushions.
You'll prolly find a bad u-joint, regardless!

Took the car to the hobby shop at lunchtime.  This is what I've found.  1. The parking brake cable on the driver side hub is disconnected. For now i have zip-tied it to the rear control arm. 2. The U-joints are in excellent shape. No movement at all.  3. The wheel bearings are all good.

I honestly think that my problem lies within the hub under the rotors where the parking brake components are at.   Here's my question.  Can you take the caliper off without disconnecting the lines?    And second....WHAT THE HECK WAS CHEVY THINKING WHEN THEY RIVETED THE ROTORS TO THE HUB???!!!!      Anyway..any tricks to drilling those darn things out?? Should I be cautious of anything or just have at it??