Picked it up today. The pickup slip said "rebuilt motor and replaced trigger." Get it to the truck and the same problem. Or so I thought. Took it back inside and they had a senior tech look at it and he informed me that it is normal on the new brushless as an overload protection? I'll have to run some bits and screws to give it a full test. Can anyone confirm or deny theirs does this? In short, if I use the drill power to tighten the chuck, the motor pulsates after the chuck is snug and shuts off. It does it in various modes, hammer, drill and various clutched settings. Again, I haven't put bits in it to see how that handles.