[Dewalt dcf899 1/2” impact]

Also the anvil is stuck on the shaft and will not come off 

[Dewalt dcf899 1/2” impact]

Hello. I’ve had my dewalt impact for approximately 3 years. Has worked flawlessly up until this weekend. It started acting as if the battery was dead but still had 2 bars. 
 

the impacting has stopped. Take it off the nut it spins freely but if I squeeze the socket I can stop it with my hand even in the 3 setting. 
 

when on a nut it may impact once and then acts like a dead battery. Just quits until you depress the trigger again. Then same thing one impact maybe and then nothing. 
 

any ideas what to look for. I did open it up and couldn’t see any loose or broken wires?