Truck will not go when on the ground...

[ncalenda]

I'm having issues with my ESC in my rustler, I have the quark 125b while the stock one gets fixed (I did a huge jump that slit the truck in half, and riped out the wires).

While I was using it with the 125B, all of the sudden I lost power. So I thought that I smoked the motor. I bought a new vxl motor, and I get the same problem.

The problem is, in the air, the wheels will spin and the tires will balloon. So it acts as if it is working. As soon as I put it on the ground, I can't go 1 mile an hour. The truck cogs. If I hold it in the air, and hold the tires, I can stop it, it is like there is no power.

I have tested with other battery packs.
I tested with 2 motors, one brand new
Work fine in the air
doesn't go when they on the ground
I only use 2S or 3S in the rustler
I push the car on the ground, and it rolls easy, 5 - 7 ft (Gears should be fine)

Any idea what would cause this?