Originally Posted by CraigMBA

Ever driven a sedan with a front diff, and then tightened it way up? Or a one way, and then switched to a spool? Same thing as heavier fluid. More steering center in, pushes center off. This is why the Ryan's setup sheet from the Reedy Race/Spectrum race has the front overdriven, it adds on power steering.

I had 60K in the front and thought it was way better than the 30K I have in it now, but some users reported breaking front driveline parts as a result of too little diff action.