For those who saw any of my prior post, I was running a VXL with a Tekin SC4x 5.5 and it was sputtering like it had a rev limiter. The only way to attain full speed would be to slowly ease into the throttle on a super long straight. I checked everything and when I changed the ESC the problem finally went away. I would advise that no one use the Slash VXL ESC even though it says that it is compatible. I am now using my 1/8 scale mamba monster and this truck is hauling!!