[jhautz]

I removed all of the old solder from the back of the motor last night (well as much of it as I could get off) and resoldered the whole thing with the lead free silver solder. That stuff definitly melts at a higher temp and doesnt flow as much as the other stuff so I was able to build up a much taller bead of solder on the trace. I took it out tonight after work and ran a pack through it. I looks like this solved the issue. It ran great all the way through the whole pack. This time the motor and esc temps got a little higher cuz I was running in grass that was pretty tall and its a low buggy so it created quite a bit of rolling resistance. I didnt have my temp gauge with me but the motor got just hot enough that I couldnt hold my hand on it past a count of 5. But its all good. No thermals and no meltdowns of the motor.

I guess all solder is not created equally. At least I learned something from this and it only cost me a few buck for some better solder to fix it.