I was at the lake this afternoon and put the truck in 4wd to pull the boat out of the water. I have shift on the fly and when I put the truck back into 2wd the 4wd light kept blinking and it stayed in 4hi. I then put the truck in Neutral and tried going into 4-lo then to 4-hi and finally to 2wd and it stayed in 4-lo. I need immediate help, does anyone have any suggestions?? Thanks in advance!!