Transfer case for an automotive powertrain system

A transfer case for translating rotational torque from an engine to first and second differentials of an automotive powertrain system, said transfer case comprising:

• a housing;
• a primary shaft rotatably supported in said housing and having an input end in rotational communication with the engine and an output end in rotational communication with the first differential;
• a secondary shaft spaced from said primary shaft and in rotational communication with the second differential;
• a clutch assembly in communication with said primary shaft and said secondary shaft for selectively translating rotational torque therebetween;
• and
• a sleeve operatively attached to said primary shaft between said input end and said output end, said sleeve having an outer surface with a plurality of radially spaced flutes defined therein for directing lubricant from a predetermined location of said housing toward said clutch assembly during rotation of said primary shaft.