Novak GTB- 'THERMALED?'

[BORMAC]

Out test driving my Catsx yesterday with a sintered 13.5 Novak GTB setup runnig kit standard spur and a 28 pinion ( I know it wasnt the correct gearing-I need 7-1 apparently) and after around 10mins the car stops. Fan still running but no steering etc..Sure the motor was a little hot but nothing that i havent seen before.After cooling down I ran it again and it lasted less than a minute. I tried this a couple of more times but it just kept shutting down. I have the Lipo cut off model but I tried fresh lipo's each time and still shutting down. Any idea's?