mamba monster issue

[CerberusVI]

So a while back i had a mamba monster that i had sent in for warranty replacement. I received a new one back, re-soldered my CC bullets, stuck it in its box and its been sitting unused for 4 months now.

I finally finished the project it was going in the other day and was doing some testing. Ran it on 5s with a turnigy 4168 2650kv motor and it ran fine with no issues, but my motor hit 170F and i stopped and put the truck away. Tested it again and the motor got hot again. Each time i ran it i only went for about 5-7 minutes.

I then took the CC1520 out of my truggy and tossed that in. I ran it once with no issues except traction, again 5-7 minutes. I swapped out the truggy tires and put on some big joes on i had.

Now i get really bad stuttering when i try and drive it. I can pull the throttle it moves 2 feet and stops, pull it again same thing. I recalibrated the ESC, Rebound my radio, tried a different receiver, Pulled the 1520 apart to inspect for any damage (Its brand new), No damage. I know your not supposed to do this, but without the pinion I'm able to rev it. as soon as i toss the pinion back on stutters. I've even tried with and without a servo. Took the motor out, Drive train spins freely, center diff spins fine, both front and rear diffs move freely and rolls fine also.

I don't know where to go from here, It had Firmware 1.32 on it when i got it back and that's what i had been running. I then downgraded to 1.24 and i still have the same issue. Thoughts?

Mamba monster V3- 1.24
CC-Neu 1520
Zippy 6s 5000mah 40C