FisherPrice Problems

[CyberWolf_22]

We are using two fisher price motors into 5:1 Banebot transmissions. When we run the motors at any speed they shut off after a variable amount of time it decreases with each time we do it. The motor seem to be getting hotter but nothing like they should be turning off. They are only slightly warm. We don't know what is causing this at all. We have monitored the current in the motors and they are steady at about 20 amps till right before they shut off and they ideally with out going through any other value go to zero. The breakers are not popping because it also does it when it is connected directly to a 12v battery. If anyone has any experience with a problem like this I would really like any advice. Does anyone know if the fisher price motors have any thermal shut offs or anything like that. Also we have the 9012 motors.