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F250SD 4WD Problem

Discussion in 'Ford Trucks' started by gusdust, Dec 29, 2009.

  1. gusdust

    gusdust Senior Member
    Messages: 143

    Odd situation here and trying to avoid any un needed expense. 2000 F 250 SD PSD Auto Warn Lockouts, Switch on the dash. Decides to stay in 4wd when switching to 2wd, or stays in 2wd when switching to 4wd. It will not try to shift. No power to shift motor. Dash light indicator stays in stuck position. No dash codes. Have another truck so swap transfer case shift motor, switch, fuse/circuit breaker, still nothing. Borrow snap on scanner, hook it up. No codes. Unhook scanner, it magically works again. Have two snow events using 4wd, 2wd a lot, then quits. Put scanner on and off, works again. Don't need to buy main PCM , computer, whatever right now, but stumped. May have to buy anyway. Any thoughts?
     
  2. Powastroka

    Powastroka Member
    Messages: 84

    A shot in the dark, but when your having problems do you only get defrost? Even when the selector is at the floor, or the dash vents?
     
  3. RobbieB

    RobbieB Senior Member
    Messages: 122

    Vacuum would have nothing to do with his transfer case not shifting. That would just be the hubs.
     
  4. gusdust

    gusdust Senior Member
    Messages: 143

    No, but have had that problem. Bought truck new. The vacuum hub-engage feature lasted about 2 years. Between that and the hubs being so hard to turn manually, I went to the Warn's. Plugged the vacuum lines at the hubs and no more problem w/heater. Will try Snapon trick once more then hire a professional if it doesn't last.
     
  5. Powastroka

    Powastroka Member
    Messages: 84

    Try a ford truck forum eg; powerstrokenation.com, or thedieselstop.com