Ironhead Starter Question

[SHEEPDAWG]

Ive read the starter pinion gear thread and Am Having a similar problem..But slightly different, want your guys opinion*..Brand new solenoid and Bendix gear..tested the starter with primary cover in place. it engages the bendix to gear just fine and turns the motor over but only a few seconds and then makes a clattery free spin sound..I can release the starter button and redo the process..If you were counting engine sounds it goes> ( in lopes) 1-2- Free spin or 1-2-3- free spin..does this sound like a loss of current problem or a starter problem?? anyone else ever have this?