Novak Goat issue

[LawMan02]

I'm running a Novak Goat brushless system on my AX-10. I use a 7.4v Thunder Power 1900 mah battery. I've run about three battery cycles thru it and started having trouble. At first I thought it was a weak battery b/c it started about the time the battery should have been used up. I recharged the battery and went back out today. The truck jumps when moving forward but will level out when it gets to full throttle. If it gets into any bind like starting to crawl up on something it starts stuttering and will not move or spin the tires. Works fine in reverse with no issues. I did notice that the red light blinks slightly on the ESC when this stuttering occurs. Any advise is very much appreciated. Randy