Test 2 of 3D Printed Gears 

The second generation N scale Bachmann DDA40X locos had real problems with cracked/split axle gears (1st gen also). I have two of these so designed some gears using Fusion 360 and the GFGearGenerator add-on.
They seem to be working fine so far but I haven't used the loco extensively. I'll put the print files up on my thingiverse account and have much more info on my website. 1fatgmc.com. Go to my main train menu and then to the menu called 'Misc. Locomotive & Rolling Stock Related'. You will find the info on the gears and the links to the print files.