Joe, my simple answer is "no"... bearing grease measured to the gram? (Laughing).
Too little grease is a reliability problem... too much is just a leaky hub over time ... which can be confused with a symptom of overheating bearings as well... both will cause grease ooze from the hub's edges.
I only pay attention to the torques. Axial forces on the bearing dictate it's life-span (assuming enough grease). In the micro-realm, as bearings go, axial forces of the balls in their races determine the resonant frequency... which are excited by the rotational frequencies coupled with the number of balls in the race. If resonances or chatter conditions are reached, fretting wear of both the ball's and most especially the races begins to occur... which increases friction, which increases heat, which decreases the viscosity of the grease relative to the designed viscosity, which in turn increases fretting wear and chatter, etc.... 'til bearing failure.
Too tight (axial loads on bearing) and the frictional forces exceed design condition, which causes increased bearing temperatures, decreased viscosity, hence increased wear, eventually causing fretting wear, etc. thru the repeticious failure cycle.
There should always be enough grease in the hub (which grease is at lower temperature than grease acting in the bearing races during driving) to allow the exchange of 'cooler' grease with hotter grease in the convection and dynamic exchange of these fluids. Excess grease can only cause excess pressure (grease expands as it's heated) forcing some to leak / ooze out of the hub's edges... which as I stated above can be misleading --- leaking also occurs when grease is overheated to the point of having such a low viscocity that it seeps out the hub in greater quantities.
That said, I used to pack my VW bearing caps full to the hilt and then some... never had a problem except for the seepage.... which I didn't consider a problem at all.
Longtooth
67 250SL US #113-043-10-002163
95 SL500
