Is there a thread on how to change the rear calipers. Or can someone give me some insight. Please help is needed

 

Its actually very easy and straight forward. If you've ever done front brakes its essentially the same thing. There are two bolts that hold the caliper to the bracket. Once the caliper is off you can pop off the pads, and use either a disc brake tool or a screw driver and twist in the piston. If you need to actually replace them, take it off, remove your pads, and then remove the banjo bolt. That's all.

if you need to replace the rotor, there are two more bolts that hold the bracket for the caliper on, once those are out the rotor will slide right off.