I have a '16 which I bought as new old stock in '18. Everything but the rear diff lock works great. That, however, won't release immediately after shifting back to turf. It is bad enough that I don't use 4wd if I don't HAVE to there is no telling when it may pop out. This was with stock tires, new mudders, and weaving while driving to relieve lock mechanism cross load. I've searched here but not found any similar problem. Is something in the cable or control binding or is there and internal diff lock problem?