Monster maxx esc problem?

[luvsrc]

I have 2 monster max esc i have a jammin brushless truggy that has neu 1515 1 y 2200 kv with 5s lipo the first monster esc (has same power settings with the other one) runs like 32mph only and doesnot have much snap off the line cannot lift the front wheels off the ground when you punch the throttle then i installed the other monster esc then with same everything BIG DIFFERENCE it lifts off the front wheels very easily with punching the throttle and truggy has much more power and snap these monster escs are version 2 can i just send my monster esc ( the wearker one to castle) and have them fix? or maybe i'm missing something? thanks for any input!