Hi! this is my first time post on forum (I been viewing almost everyday here). I own a 04 350z and recently when I backing out of my car, when I step on the brake, it will make a squeeking nosie but when I do I regular stop, there was no noise, so I took my deal to do a check, althought it change a lot of things for me(
rear axle, adjust the Shim kit) it still have these squeeking sound when I backing and only when I step on the brake when I am braking, I just want to know is anyone have this problem and anyone know how to fix it? thanks !!

 

I believe there is a TSB on the problem. My Z does it as well, only in reverse. The fix is some new shims behind the pads.

 

thanks!!