Yesterday as I was driving on the freeway at 65. I begin to hear a grinding noise. So I pulled over and I heard it disengage. For reading on here i know that's the front hubs trying to engage into 4x4. But when I got home I tried putting a truck in 4 wheel drive. And I got nothing lights did not switch and didn't hear any attempt from them trying. Where do I start what do I check I took a quick look at the fuses and didn't see any blown

 

Hubs trying to engage while driving is due to a loss of vacuum...now not being able to shift into 4WD sounds like the Transfer case.. you may have a couple problems..when is the last time you used your 4WD ??

 

I would have to say sometime in Feb. Worked then. Ill have to look at the Vacuum lines

 

it's either your IWE solenoid 30$ or your iwe actuators them selfs try the solenoid if it's not that message me and I can give you all the details in how to replace your integrated wheel end actuators

 

Update I checked vacuum hoses couldn't find anything leaking I did tap the transfer case motor with a hammer and it did go into 4 wheel high but no 4 wheel low i will change that Iwe solenoid