I have 2012 Durango Sxt. Currently setting with 203k on original motor and transmission. From a dead stop , mash the throttle and the noise coming from the front driveline sounds like an axle or transfer case chain jumping. Take off easy, no noise. Seems much worse going up a grade or with the wheels turned full. This has been a great ride and can't afford to replace it yet. Any suggestions or information is much appreciated. ATF+4 level is where it needs to be.