'66 GTO Rear Suspension Squeak/Noise
 

On my new to me '66 GTO, I'm getting a rear suspension noise when pushing down on rear bumper. It also makes the noise at a dip in the road when driving.

It has air shocks (almost new), car sits level, and is very, very clean on the underside. Sway bar bushings, trailing arm bushings? Or what else?

At my age, 78, it's hard to get my old a** under, or out from under the car.

Am also getting occaisional squeak/rub noise in front suspension, as well.

And from an 'ol guy, Thanks for your help!

Does it have poly bushings by any chance?

Would this picture help determine if poly or not?

A quick treatment with WD 40 on all the trailing bushings may tell you if they are the source for the squeak. It won’t last but an hour or so before it evaporates. The rear springs could be shifting in their spring pockets especially with the use of air shocks holding up the weight. Maybe bleed the air out and try that next.

I can't see them very well but I don't think they are poly. Put the car on the floor and have someone bounce it while you feel the different parts for vibration.