Jammed Avid Juicy 5 brake piston

If you already overhauled the caliper, I would overhaul the lever as well. In fact, I usually overhaul the entire system instead of one or the other. As for the chattering sound, it sounds like the rotor is catching the edge of one of the brake pads. Check to see if the pads are retracting fully or see if the pads are loose in the caliper.

It sounds like you have a piston that is not fully returned and is sticking.

Get a big flat bladed screw driver, take the wheel out and very carefully insert the screw driver into where the disc would sit and use the screw driver to try and push each brake pad back in without damaging your brake pads.

If this works go to a local bike shop and ask them for a avid brake insert for transporting your bike so this does not happen in future! :)

Juicy's are prone to sticky pistons.REMOVE pads,clean calliper ,pull lever lightly and add a drop of hydraulic fluid to the edges of the pistons to lube.Recess pistons,wipe off excess fluid and fit pads.If this doesn't work they might need bled.

pads and rotors wear together. if you dont replace the rotor along with the pads, the pads wont have complete contact the rotor and will not have the stopping power they should.

Your brake failed and you need to take it to a good bicycle repair shop in your area. Hydraulic brakes on bicycles are not easy to self service as you need specialized tools and the proper replacement parts.

There are some ways this can happen. If you accidentally apply pressure to that brake lever with the wheel removed you will have to gently force the pads apart with something that won't damage them and then bleed that brake. You will need a bleeding kit for that model as they are unfortunately mostly all different because of the fittings needed. The other problem is a sudden application of the brakes in an emergency will cause the seal in the brake lever in the piston to blow which requires part replacement and a brake bleed. If you want to attempt the repair yourself there is info at www.Parktool.com. In either case you will still have to go top a good bicycle repair shop for the necessary tools, parts,and supplies. Ask for brake wedges while you are there. They are fairly cheap plastic wedges that keep your pads the proper distance apart when you are transporting the bike with the wheels off. Hope this helps.

use a flat screw driver and push the pads back in on the calliper. Be gentile though.

Your brakes adjust automatically (so when the pads wear down your levers don't get looser). What you did was pull the brake lever and it adjusted making the pads shut.

Anyway all you need to do is take a wide flat-head screw driver and wiggle it back and forth between the 2 pads.

take the wheel out insert a very large flat bladed screw driver up into where the rotor would sit and lever the pads back in very gently with the screw driver.

if this does not shift them they will need re-built by a Sram bike shop.

Do not bleed the brakes! If you don't have the plastic rectangular spacers that came with the brake when they were new, go to your local bike shop or get an "old" teflon kitchen spatula that's thin enough to fit but make sure its a bit thicker than your rotors and try to pry the pads apart then wiggle it until a good portion is in between the pads. Then squeeze the brake lever with the spatula is in between. This should reset the pads leaving enough clearance for your rotor to fit. NOTE: Avoid depressing the lever when the wheel is off. This will cause the pistons to travel further than usual causing both pads to come together. Hope this helps.