That's a lot of power going to that gearbox. I can imaging how fast that diff is spinning when they turn corners. Have you tried cranking down on the diff to lock it up?
So, daughter has a Losi XXXT. She wants to start driving it, so I decided to upgrade the ESC. To go the cheap route, I decided to keep running the brushed motor in it, but got to LiPo batteries. That's why I'm updating the ESC. On Ebay, I found Hobbywing brushed ESC's for under $20, brand...
If you are sticking with the NiMH Batteries and brushed motor, I would go with an old school racing ESC. Like TNT mentioned, the Tekin 420 is a good one. Another really good one is the Tekin 411G, and 411P. The number states how many cells they will handle. For example, 411 means it will...