hv is cutting out

first thanks to all the contributors i do thank you.To answer the # of packs i am running 2sx2=4s.So i went to the track and ran tree packs, the new glitch buster was a partial sucsess in that it allowed me to get 5 or 6 min of run time before it would " lipo cut off".In the first recharge the packs were only accepting 2800/2900ma on the first run and then i had to gear down because the pinion failed and the temps were 156mtr ,151esc, 97 batts.The next two runs the batts only accepted 2200ma and the temps came way down to mtr 131,esc117,batts85 and the pop,speed and run time till it quit were about the same so it seems to like the 9/62 gear.i dont want to run an external BEC, i have one but last time i ran one it caused a cogg and Bob novak himself had no answers so i think the next thing i want to try is pull the red wire from the signal harness and try an rx pack.I think its quiting when the 4s packs have dicharged to a point they cant supply enough amps too the rx and servo or the BEC is overheating either way it should be the ticket unless you know this to be incorect.I do hate hanging bandaids off my stuff Butt $ are pretty short