I'm so sad

...Yesterday, I bought a second car, and it was working GREAT, no problems. Then, when I was putting it away, I dropped it from about 3.5ft above a wooden floor, and now it's turning radius is the size of a watermelon. I'm having a hard time making deductions as to what it is, because I took off the shell, and examined the PCB and the chassis, and everything looks the same as the other car...any tips as how to fix this? or to fix turning radius in general on a car? I believe this might have been mentioned before, but I need a direct answer. Thanks in advanced!