When I slowly reverse at an idle,something seems to drag and release. Caliper,brake shoe,any ideas ?--------------GeezerD

 

Is the dragging sound from the front or rear?
If the rear, I'd imagine it's the self adjusters and shoes making adjustments.

 

I don't hear it so much as feel it. And I don't seem to notice it in the steering wheel. Probably in the rear. It is most noticable after it has sit overnight.
---------------------GeezerD

 

Pull the wheels off and look - it may be a broken brake spring.

If everything's OK, it could be your Limited Slip Diff needs a tube of slippery stuff. Parts house, about $10. The clutches are sticking slightly.

That additive wears out.

I know I'll get arguments from armchair "mechanics?" that it is impossible but try it!

 

warped/out of round brake drum most likely