I have a 2005 F150 FX4 with a 5.4. When I switch it into four-wheel-drive there is a grinding noise coming from the hubs. It is not a terrible clunking nasty grinding, it sounds more like a kid with a card on his bike spokes . It's more of a heavy ticking sound, but it's not in four wheel drive. If I leave it switched into four-wheel-drive and shut the motor off and turn the motor back on it will then be in four-wheel-drive and stay there. There seems to be no issues with it coming out of four-wheel-drive when I switch it back out. If anyone has any ideas on what this could be any help would be appreciated . Thank you.

 

sounds like the IWEs are only partially locking in

 

same here. could be vacuum solenoid causing that

 

Thanks .I'm going to replace the solenoid tonight, if that doesn't work I guess I'll replace the actuators next. I appreciate the feedback.

 

Any update?