I replaced the bushings in my black steelgear trans with flamged bearings from dynamite( horizon hobby)
also shimmed it to get rid of excess side movement, used a combo of shims from ofna for a cluch bell shim kit and from team losi( supension shim kit) found tbese were cheapand made a nice differance in the gear noise. Next thing will to lower the pinion size,
the shim kits cost a total of about12$$ and the beatings around 20$$ not bad id say id go with panthers 400 motor idea.. The 380's are weak.im thinking of a 2esc with sensoed brushless system next.. Sensored is the way to go if going this route