This light came on and my 4wheel drive will no longer engage. When I push the 2hi button I hear a whining sound for about 10 seconds. When I push 4hi or 4L I hear nothing. I followed the whining to a part bolted on the back end of the transfer case. I unplugged it and removed that part. I then took it apart and it's a set of gears which i'm assuming is what engages my 4wheel drive. Does anyone know what this part is called? I have searched the internet with the part number and can not find anything on it. I'm gonna bring it to the dealer tomorrow but just thought I'd ask here first.