Very weird issue. The last day or so when I start the truck it's switched itself into 4wdLO at startup. The first time it did it was panic inducing as I started the truck up put it in drive and it lurched forward and made a loud knock from the transfer case. I cursed and freaked about bit. After shifting through the gears with my foot on the brake the SERVICE 4WD light came on which prompted me to look at the selector switches and notice the indicator switch was flashing in 4wdLO. I turned the truck off and then started it again. 4wdLO was illuminated. I pushed 2wd which flashed until the truck was shifted into N at which point it apparently went into 2wd and then drove normally home. From then on the truck has been in 4wdLO every time I start it and I have to shift to N and then select 2wd which will flash until the truck is put into N, not P or D but only N. I'd love thoughts on what sort of evil force has possessed my transfer case/transmission/electronics. I suspect that a weak starter is pull down voltage pretty hard on startup and might be making the truck's systems kind of freak out a bit and send false signals to various systems. The last time I started it it did reset the radio clock the way it does when the battery is disconnected and then reconnected. Thoughts?