There is an actuator on the back of the transfer case that likes to fail odds are this is where your problem is. check power and ground here and if you have both replace the actuator
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Check out F150OwnersBlog.com or 4x4Owners Blog. It sounds like the actuator inside the transfer case is stuck.
If this is the Vacuum shift setup, the plunger inside the 4x4 box is sticking. You also could have low vacuum pressure from a bad Vacuum pump on the engine.
The Electric setups worked differently. The voltage running to the underside wires to the shift solenoid had set values to extend and retract the solenoid plunger. Often, a burned out light in the inside Selector switch on the dash would affect the Voltage sent to the solenoid. A silly thing like changing the indicator bulb would restore the proper voltage underneath the truck.
Remember to sequence the trans to neutral before engaging some of the transfer cases.
Be sure to put the truck in neutral, while engine is running, while you disengage from 4 wheel drive (low) to 4 wheel drive (high) and then finally to 2 wheel drive. It is critical to shift transmission into neutral when switching out of 4WD Low, as indicated in your owner's manual. Hopefully, this will help to FixYa problem!
if the actuateor is vacumed,you might have have a hose that came off or it has a split in it somewhere,check that.or if you have posilock hubs one or both may be wore out or lacking grease,they are easy to remove,just a hex wrench and snapring pliers is all you need,remove and inspect for obvious sighns of wear.
If your sure it is acually going into gear than check the auto hubs, they go bad alot. also you can with help from a 2nd person jack the truck up all 4wheels put the truck in 4x4 and drive and see if both drive shafts spin if they do its the hubs if the front one doesnt, its the transfer case
Check your transmission ranger switch or some call it neutral position switch on the transmission for loose wire or defective switch.The 4X4 will only engage or disange in P or N
no, DO NOT use gear oil. The transfer case uses the same type of automatic transmission fluid that the transmission uses. Is the display saying "service 4x4 switch"? If so it is common and the 4WD indicator light switch is bad and needs replaced. It's only purpose is to tell the driver info center what 4 wheel drive mode the transfer case is in. This switch will not affect the function of the 4 wheel drive. The correct fluid for the transfer case is +4 automatic transmission fluid.
sounds like transfer case is locked when in two wheel drive
Not working at all
non elect shift no 4d
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