Throttle Problem...

[Hockeyplaya20]

If i go foward im getting about 6-7 mph
if i go reverse, this truck is like a bat out of hell :D
What wonders me is why? Do i already have a defective ESC?
Here is my set up

Btw, what you recommend for drive shafts?
I lost range (20 feet away...) and it started to glitch, going WOT reverse, immediately stop, and repeat, sometimes forward. This put ALOT of stress on the driveshafts, thus braking 2 more, thats 4 drivehshafts with this 6s MMM monster :)
Btw its in my revo
btw
dont worry, 50$ more till i can buy a dx2