I don't hear anything abnormal. Are you talking about the squeak when you first start it that goes away in a couple of seconds? My has been doing that since I owned it. I'm on my original belt and it works fine 1300 miles

If it comes off again I will try something but hopefully it doesn't I think the cable was too loose at the handle which created too much slack in the cable.

There is likely adjusters on each rear caliper and one where it attaches to the handle. Don't go too much and do the ones at the calipers the same..if they are there.

I adjusted the emergency brake at the handle and it still didn't work so I pulled off the back wheels and on the driver side the cable literally had slipped off the hook. I pulled the emergency brake mechanism with my hand and looped the hook back over and I have excellent emergency brakes again!! 

I have a 2023 ZForce950 HO and the emergency brake cable seems to have stretched. How do I adjust it?