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What year? Pre 1999 Ford used the fully automatic hubs. These had a bad design causing the cam gear to not operate correctly. If they stay engaged put it back to 2wd and reverses turning the wheel left and right this should disengage them.
1999 and up super dutys had 2 kinds. The Pre 2001 had auto/manual hubs which worked pretty well. The later models used an auto/manual hub but modified. This was operated by a vacuum line, when you engaged 4wd a vacuum was applied locking them. You could also select manaul to ensure they were locked. So look for vacuum leaks.
What else can I help you with?
1989 ford f250 fuel problems it cranks but won't start?
1989 ford F250 Fuel Problems, It cranks but wont start
Why wont my 2001 ford f250 fire the engine will turn over but not start?
Does it have spark, fuel, compression?
Your four wheel drive on your 1995 ford f-250 diesel wont work?
did you get out of your vehicle and physically lock the hubs on the front wheels? there automatic locking hubs.
Why wont the new starter you replaced on your 93 ford ranger 4 cylinder disengage after starting engine?
Check and or replace your starter solenoid.
Why wont the starter on a 1992 Ford Ranger disengage?
Your starter has gone bad and will need to be replaced unless you can take the starter to an automotive electrician and he may be able to fix it.
Will an 04 Ford F-250 8 lug wheel fit an 06 f250?
no they wont fit 04 is a 16 inch wheel,06 is a 17 inch wheel
Why wont Geo Tracker clutch disengage?
torque flight transmission
Why does my 92 f250 starts but wont stay running?
weak fuel pump.
Your 1992 Ford F250 wont crank with the ignition but will at the cylonoid What could be wrong?
Either the neutral lockout switch, an electrical connection or the keyswitch. If it's a stickshift it could be the clutch pedal lockout switch.
Why wont the 4x4 work on your 1986 Chevy Silverado?
Do you have automatic locking hubs on the front axles?
94 F250 parking lights wont turn off replaced relays switch still wont turn off?
check for short to power in the circuit
Why is my 2001 7.3 f250 diesel changed cam sensor but still wont start?
possible weak batteries?
