2007 f150 5.4 super crew 4wd issues


#1

My f150 4wd worked great to pull a car out of the snow the next day my motor froze up I had a new motor installed and the day I picked it up the 4wd didn’t work. I have vacuum to both actuators when in 2wd and none in 4wd with light on. If I disconnect the vacuum lines at solenoid while in 4wd and put them right back on then drive it 4wd drive works, so it’s like the lines are not venting but I can blow threw them. Any ideas how it’s holding vacuum to hold the iwe’s from engaging??


#2

Turns out it’s been below freezing here for sometime and the actuators locked frozen in 2wd position. I’m suprised I didn’t get 1 comment, I guess this isn’t the site for me. But I will still listen to the guys on Saturday mornings.


#3

Glad things worked out, so it is now working? If so next question would be why was there enough water to lock the activators.


#4

My Ford 4wd truck must not have those vacuum actuators. My motor never froze up once pulling somebody out of the snow. Even in sub-zero temperatures. True, mine is 40+ years old …lol … But you got a new one there, so I guess you are right, this forum isn’t the right place for you.

BTW: Didn’t you find it unusual your motor froze up while pulling somebody from a snow bank?