DeWalt DCD996
From RiceFamily Wiki
The Chuck on my DeWalt drill eventually ate itself and will no longer open or close. Rather than pay lots of $$$ to buy a new drill, I'm going to see if I can replace the chuck.
I found several videos that cover the process. It doesn't look very difficult. There seems to be only one tricky part, and it looks like it just requires a bit of care to not lose all the roller bearings.