Hello, I've had this Transmission for some time, and I've been working on adjusting the slipper for light "dirt / small rock" bashing and am having a really hard time finding a good spot. it seems either the transmission GRABS or SLIPS and not much in between. The slightest bump sends the truck in a 180 at half speed with a standard castle 1410 motor and 2s 50c bat. Do I need to crack open the diff and replace the fluid it shipped with, do I need to really under-tighten the slipper? Any ideas / help would be wonderful.