Noise and smell

Take it back to whoever did the work. You really didn't need me to say that, did you?

Oh, believe me I am taking it back. But I thought some of you kind experts could give me a heads -up, so when I do take it back they can't give me the runaround.

Unusual to replace rear drums - unless brakes grossly neglected or over 160k miles. Suspect shoes (springs/clips) were not installed properly (clicking); not radiused to the drum or not adjusted properly. Disk pad rear? ya mean front - cuz you have either drum or disk brakes on the rear not both.

Yea...you probably needed drums...

TYhey could have machined the old ones if they were still in tolerance, but the would have banged you ~$40 for that 'service'. (They put the drums on a machine and walk away and do something else for 20 minutes, then change the other one and walk away for another 20 mins...

Where was the work performed? If it was a independent shop, some aftermarket brake parts make a lot more noise than OEM brake parts. Most likely, something was not put together correctly.

It was serviced at Sears. But today, all the noise and smell is gone completely????

If the noise and smell are gone, it is possible that whatever coating they left on the brake surfaces burned off, and the shoes have seated. Keep a nose and ear out for their return, otherwise, I wouldn't worry too much.