Ok there is something in the front diff making the wheels turn slower less freely as they should like as if had rusted old as bearings I have replaced the drive shafts to a hole new set all new bearings new spur gear new pinion new tranny spacer new tranny shaft new diff bearings ax10 shafts with axial alloy c hub and high steer knuckles 4 link front drive shaft angels are good the drive shaft pins are inline I run hd overdrive in front it also makes the drive wobbly I also add oil to motor bearings and clean rig every 2 to 4 runs what can it be anyone ??