Yesterday i was switching out spur gears from the stock 45 tooth to a 55 tooth, and now it makes this weird sound, hard to describe but it also is slower than it used to be and it stops quicker without me even braking just let go of throttle and it basically stops in 1 second, its really wierd and im wondering what it could possible be, this car has been nothing but issues ever since i got it. idk if its bad luck or what but its fun when its actually up and running lol