gear ratio ?
 

i kinda asked in the savage forum already but thought this would get more attention. Is a 10.22 gear reduction to low for a brushless motor? Do the lower kv motors make more torque? could i just use a lower kv motor to compensate for the high gearing.

we need to know what motor, what battery, what transmission, what diffs and what the desired speed is

Torque is a function of current and kv. torque (in ft-lb) = (1352/kv*amps)/192

i dont have a motor yet it is a savage with a center diff (46 tooth), cen diffs, which the ratio is 2.89. They are polyquest 5s 5000 batteries. As for the speed around 40 would be nice.

Use the parameter solver with your info:

http://scriptasylum.com/rc_speed/