Lately (for the past few weeks) almost every time I drive the car after it's been sitting while I get a light rubbing/humming sound that I could swear is coming from the left rear wheel. It usually only lasts a block or so then its gone (also first use of brakes).
I began experimenting by holding the e-brake release lever while pressing the e-brake pedal which would also make it go away.
Naturally I assumed something was causing some pressure on the rotor when the brake wasn't being used. I thought I even noticed a little more brake dust than usual on that wheel (I've never had ANY brake dust to speak of with rear discs).
Took the LR wheel off today expecting to find a seized or rusty/binding slider pin, but didn't. They actually looked pretty good. The grease was dirty, but everything seemed to be functioning as it should. Pads are about 50% worn or so, with even wear.
I also thought I might find the e-brake cable binding up, but it also appeared to be moving relatively freely. It wasn't difficult to pull some slack (with locking pliers) to get it off the caliper.
I just cleaned up the sliders and boots and applied some clean grease and reassembled.
Just curious if anyone has any thoughts or ideas.
I suppose it could be one of the other wheels, but I was 99% sure that's where it was coming from.
Oh - one other thing.
It didn't look like the piston was aligned properly for the little "nub" on the back plate to line up with the indentions in the piston. The "nub" was about 1/2 worn off. I rotated the piston slightly so it would align.
Maybe it was that simple?
That'd be a change.