At times during the start , the starter will engage and then disengage as if I have released the key. Then all by itself will reengage sometimes not fully and grinds into the ring gear. This is happening more frequently and causing damage. It's as though the solenoid releases and then reconnects but not fully so the starter gear is not fully pushed into contact with the ring gear and just grinds. New truck with only 3K miles but doing it since I got it a couple of months ago.