[shorod]

Are you able to determine the approximate area the creak is coming from, such as front or rear? Possibly a dry u-joint if from the middle of the car, or bad CV joint if from the rear. There are various other suspension joints in the rear as well.

It sounds like you need to find a shop that has a Steelman Chassis Ear system to isolate the noise. The Chassis Ear consists of up to 7 clamp on microphones, a pair of headphones, and a switch box/amplifier that allows you to switch between each of the microphones. When you find one that the sound is loudest at, move the other 6 microphones to that area, and continue this process to pinpoint the noise.

-Rod