How Can I Reassemble a Drill After Disassembling It?

[Stephenk53]

I recently took apart a drill I got from goodwill to see the inside and I want to put it back together so I can use it for a DIY project (not sure what project yet) and I can't for the life of me get the gears back into place. Any tips on how to get them back in?

 

[Greg Bernhardt]

Can you post some photos? What tools are you using?

 

[jim hardy]

Planetary gears ? Patience.