fried 9920

Well, I noticed my e-maxx with 9920/9l was having serious issue's. When I tried to give full throttle, it would stutter and then just totally stop. Well, I was driving(for about 5 minutes) and then I heard the truck rev, but it wouldnt go. When I took the gear cover off, I saw a shredded spur and messed up pinion. Okay, I can live with that. But, the pinion gear was stuck on the motor shaft and I couldnt get it off. So, I put the pinion gear(with motor attached) in a vice. I got out a screw driver and a hammer and hit the shaft of the motor to slide the pionion gear off. Well, when I hit the shaft, the back plate of the motor came off(so, while it was off, I took the motor apart to see the inside). Well, when I was testing the esc and motor without a pinion on it, the esc started to smoke. So, I un-plugged everything and started to curse. I then emailed finedesign(rc-monster was out of the 9920 when I wanted to buy it so I had to get it from finedesign). After emailing, I decided to test the system again. Well, everything seems to work fine, and I cant figure out why it works, or why it started to smoke. I dont think that it is safe to run the truck, but what do you guys think? I wanted to buy everything from rc-monster, but since I couldnt I at least got the 9l