Originally Posted by drwillis
I have a 1998 F150, 4x4 Lariat 136,000 miles. The 4 wheel drive, front wheels won't engage. It has the switch on the dash, not manual hubs. The shaft off the transimission engages went I flip between 2 and 4.
The vaccum lines go to a round black unit, middle front of the front axle. Does this push/pull the axles to hubs, or what does it do? I haven't found any lines/wires to the hubs other than the anti-lock brakes. It also has a vent hose that goes up in the motor compartment.
I guess this is an education session. Where should I start?
Hilarious, I came on this forum this morning because my truck (97) is having exactly the same problem. I hear a small clunk from the transfer case like it is engaging when I turn the 4x4 switch but the wheels are not turning. I will check the actuator as mentioned above.
I also have heard that there is a little servo motor in the transfer case that tends to go, anyone know anything about that?
Any other suggestions would be appreciated by more than one forum member now
Are there any fuses that might be the problem? Thanks for the help, snowmobiling season is quickly approaching so I have got to get that 4 wheel drive working.