lrp sxx tc spec faults HELP

[tisher]

I have been running a lrp sxx version 1 tc spec all season on a lrp5.5x12.
the last few weeks the car after around 4mins of racing starts gittering I took the car off and when I put full throttle the esc leds were flashing like mad. This only seems to happen when the motor gets hot I changed the motor to a 5.5 novak ballistic and the first heat was okay but second heat the car just cut out after 4 mins so I think its deffo a problem with the esc. Any one had similar problems? or know what it might be?