The diff lock stays in on my 3830 until I take tension off the tires, usually at the end of a run or something... But it doesn't pop when it goes out... Just goes out.
Thanks for the reply. For some reason it seems as if this one is sticking in. I was brush hogging and never touch the brake and felt it turning hard. I buried the bucket and for some reason the diff was locked in as both tires were spinning. I had to jar it back and forth to disengage.