1st, what is the battery condition under load? (read battery volts at rest then when tilt is stalled all the way, in or out, compare) if more than a 10% drop in voltage, then charge or fix the battery first.
Next you have some adjustments available in the logics, (current limit, controlled acceleration, etc) but this is not for someone that has not been trained to understand what the differences are and how they effect other settings in the logics, and depending on the system your truck has in it, it may require a "handset" or other high dollar gages/meters to be able to correctly measure and set the control logics.