Okay I'm new to this and would greatly appreciate some help. I upgraded my 2wd Ruckus Monster truck motor and ESC to the 1/10 four pole 3000kv. First run strip metal gears in differential. I took it apart and replaced it with the plastic gears that were in it the beginning. Run it about 5 minutes and then it stripped those gears also. What am I doing wrong? And what do I need to do to get this problem fixed properly?