My service 4wd message has been coming and going alot lately and I changed the front accuator on the differential.........still there. It first started doing it while traveling down the freeway only but now it does it when ever. Still mostly when driving faster though. Any ideas? I couldnt find any bad connections on anything just earlier it wouldnt work. All the lights come on when I first start the truck then they all go off and it says service 4wd and no light indicates what range I am in. I came back and restarted the truck 30 min later and no problem the 2hi light came on which is normal and it looked all good. I switched to 4hi and it engaged find then I pressed the 4 lo button and it took a second like it was changed then service 4wd message came again. Does this sound like a bad transfer case motor or what? I really dont want to go to the dealer over this shit they will only piss me off to hell and back.