MM cogging when on ground, not when in air

[supralover72]

I finally had time to charge my lipo, I took my buggy out for her maiden voyage, and she was fine for the first 2 full throttle's, then she went full lock brake by herself, then cogged HEAVILY. Then she'd be fine for about a second or one run, full lock and cogg. But here's the kicker, she seemed fine when I pulled her off the gound.

The only thing that got hot was the ESC and the motor was warm, and this was only after about 60 seconds of runnning.

I changed my programming from 50% punch control to zero and changed the reverse setting to reverse lockout. I also changed start power from medium to low.

Gearing is 15/46 w/8xl and neu 4s

Will this work?

Any ideas?

I don't want to have wasted all this time and money and screw it up. Thanks.