Not brushless but I need help

[Thunderbruiser]

I have been having troubles with my brushed setup(I know I will get brushless when money permits. anyway I had a tekin g20 in my slash pretty much all year long and it was working fine..then I decided I wanted to run my 2wd so I put it and a stock motor in the truck well that worked for about 1 hr then all of sudden the motor just completely quit going. now the esc powers on the servo but nothing happens with the motor. I then go another esc a novak 410m5 and it does the same thing only powers the servo I even tried a different motor with the same results. I wired up the traxxas for a test and it went briefly but then just started making a whining noise as if it were being stressed and then just completely quit( I was running them both on 2s lipo 5000 28c or 5200 35c. The batteries were fully charged but I have been running without lipo cutoff eventhough when I normally take them off the batteries are around 7.7 or higher v's when I start to recharge.

do you think I just have a bunch of bad motors?,the esc's? or batts gone?

lmk asap

thanks,
Jayson