First I changes the gears because the plastic ones were broken. I have 3:1 brass gears which I hate because they are too soft. I'm thinking maybe this is the issue that one or more of the gears are bent but I haven't been able to figure out which one(s), if any, yet.
I also have new motors so I guess that might have something to do with it too. .I'll have to meassure the voltage to make sure the soldering doesn't suck