It was probably the end of February where I had an AWD light come on in my lightning. It had around 40k miles at this point. By the time I called to have it serviced I noticed the heat was not working very well. Found out that there is a diverter valve that went bad that allowed the coolant to contaminate the fluid in the rear drive unit, so I got a new rear drive unit. That seems like a bad engineering choice where those 2 fluids can do that. It was under warranty still and it took about a week. I still do not regret buying my lightning, coming up on 2 years now.