Rear brakes on 66 dart NOISE and stutter?? HELP

update: I removed the rear pass side drum, upon inspection I noticed a strange wear issue on the edge, like a bump or divot or something not right. Ordered a new drum from Oreilly, then took mine to them for exchange (2 year warranty, and I had 1 month left). Reintalled and seems to have solved the issue. not stutter and no noise. As I tested it out, I notice that if I go in reverse, get a little speed then slam brakes, I skid (lock up) from the front wheels. is that normal. I also had to slam brakes driving around town as I almost T-Boned a **** head that tried to pull out in front of me at an intersection, he had a Stop sign, I had no stop sign, I skidded from the front as well. thanks for your help guys.
I had only put about 1500 miles on these brakes, BTW.