Noisy like a chain rattling inside

Disconnect Power from the Dryer
Remove 2 screws that held the top on the dryer.
Removed the 2 screw that held the front on the dryer.
Unhooked the belt from the tensioner and motor pulley.
Pulled the drum out. Removed the belt.
Removed the three screws that held the bearing assembly
on the back of the drum.
Removed the keeper o-ring slide the bad bearing off of shaft. Slide the new bearing on the shaft put the new o-ring on the shaft. Reassembled the bearing on back of the drum. Put belt back around the drum and put drum back in place. Put The belt around the motor pulley and tensioner
(this is probably the hardest part).
Put the front and top back together.
Turned the power back on. Job done