gmagic32

I have a 98 f150 and the 4x4 stopped working on me the other day. I had been using the 4x4 that same day to get thru some muddy dirt roads and went to turn it on when driving down a different muddy country road and it did not work. Any one out there have any ideas of why this could of happened?

When washing the mud off of it today I noticed a loose piece of aluminum foil looking stuff under the truck bed as I was spraying the under carriage. It looks like it may be some kind of insulator or something.

If you couldnt tell I'm not a mechanic and any help is appreciated.

metropolis909

you have electronic 4wd? or the pull stick?if electronic check your fuses

gmagic32

I have electronic 4wd. I did check the two fuses I could find that are associated with the 4wd and they are both fine. I checked it the other night when it stoped working. Unfortunatley it's not that simple.

metropolis909

sounds like the actuator on the diff might be done with or needs to b cleaned...

texasedition

I ended up having to replace mine.

Lenn

I don't wanna start a new thread since this sounds like it could be the same issue.

I just recently found out the hard way that mine is not working either. I have a 2002 with the electronic 4wd and when I turn the switch to 4LO, I can hear the transfer case engage it but the front hubs dont lock. Any ideas?

gmagic32

Thanks for the replies. Texasedition what did that cost you if ya don't mind me asking? Lenn, mine does the same thing. I can hear the click but no 4
wd.

Lenn

I'm thinking the hub vacuum solenoid is bad but I wanna see what others have to say about it before I go ***** nilly replacing parts.

carbon

Check vacuum lines first then test the silonoids.

metropolis909

X2!!