Jumpy motor question.

[Lukescb7]

First off, my setup is.
-Xr10
-HH 55t torqumaster pros, have also tried integy 45t
-Sidewinder sv2
-punk dig
-3s Cheap battery pack 450's
-Hacked gt3b

My issue is when aplying very minor throttle forward the crawler creeps forward for about half a second, then stops. If i gradually apply more throttle the motors start up but at a kind of a "jerk". It does this with the wheels on or off the ground. Also if i go from no throttle to full throttle the motors start up then at the same amount of time as where they usually die off they slow down. It only does this going forward, in reverse my low speed resolution is amazing, Did the same thing with both sets of motors. One thing is i programmed the sv2 with the controller, im going to borrow my friends castelink and see if maybe i can tune it out on there. Any ides would be helpfull. Thanks in advance.