I am having trouble with the actuation of my 4WD system on my 2006 F150. The wheel actuators are new. The vacuum solenoid is new. I have determined that when I shift into 4WD that the transfer case has successfully shifted as the front drive shaft engages when in 4WD and is free when in 2WD. The correct dash light are present for the shifter position. The actuators seem to be working correctly as the front drive shafts engage and disengage correctly for the sifter position. Is there anything in the installation of the actuators that could have been done wrong?

I have yet to test the vacuum at the lines where they connect to the wheel actuators. I have been operating on the assumption that they seem to be engaging the drive axles correctly. What I do not have is any mechanical noises. No squeals, clunking, or grinding. Is it possible for the front axles to not be installed correctly? It seems that the disconnect is at the from differential...as if the drive axles are not engaging the differential.

Please advise...

Thanks,

Mike

 

It seems that everything is functioning the way it should by the way you described it.What exactly is it doing or not doing that has you worried?

 

The hubs were locked and wouldn't unlock. Now they are unlocked and will not lock. Even when the hubs were in "perma-lock", shifting the Tcase didn't get power to the front wheels. The dash light would indicate I was in 4H...but why would I get stuck in 4H without spinning a front wheel?

 

Have you checked out the Everything you wanted to know about the IWE thread?
https://www.ford-trucks.com/forums/8...then-some.html

definitely check out the vacuum lines to see if you have any leaks

 

...and these.


https://www.ford-trucks.com/forums/1211749-4wd-not-working-help-me-pinpoint-my-issue-plz.html#post12662529

http://www.f150forum.com/f72/how-diagnose-your-4x4-system-esof-186872/

Not dis-engaging is either a vacuum problem (most common), or an internal mechanical failure of the IWE.

What you are describing has me a bit curious...