I have a 2016 Chevy Tahoe LS, owned since new, babied, just hit 50k miles. The transmission has never been amazing by any means but it recently starting shifting erratically. The most annoying part is having to wait 2-3 seconds when going from neutral to D, before I can apply throttle - once the gear is fully engaged I guess. Needless to say, I am not looking forward to dropping $$$$ on a trans. Any preventative measures I can take at this point?