As part of my Oil Pan replacement project on my daughter's '03 TB LT 4WD, I bought a new Intermediate Shaft Bearing / 4WD Actuator assembly. Rotating both bearings by hand sounds and feels dry. Shouldn't this entire housing and both bearings be packed with grease?! Should I split this case open and fill it with grease before installation? If so, what kind? I don't know what's in it (if any!); should I go with any name brand Synthetic Wheel Bearing Grease, or is there something special required for compatibility with the Oil Seals? Thanks!