Sharp turns = binding

[ExplorerTom]

If I turn hard (like a 90 degree corner from a stop), the drive train binds similar to as if it was stuck in 4wd. It is AWD and it seems to be normal when driving straight.

What should I look for? Vacuum to front diff?

 

[ExplorerTom]

UPDATE:

Also, while straight line normal acceleration, I felt/heard what I thought was bearing related. Kind of a rough, grinding noise- but very subtle. I was envisioning front diff carrier or pinion bearings being pitted. Not a wheel bearing because turning while moving didn't change the pitch.

I searched the forum and found out about Fuse 104. I pulled fuse 104. Both my straight line noise and turning problem went away.

What does this indicate?

Is this the front axle vacuum shift system? Or transfer case shift motor?

 

[Lou-0524]

Did you ever figure out the issue?

 

[ExplorerTom]

Nope. It's been too rainy here and I've got a trip coming up that I've been preparing for.

MPGs seem to be up a little. That's nice.

My plan is to check the vacuum lines at the front diff and see if the actuator is moving fully.

Over on ford-trucks.com there seems to be some good topics on the issue.

 

[Texpedition45]

Nope. It's been too rainy here and I've got a trip coming up that I've been preparing for.

MPGs seem to be up a little. That's nice.

My plan is to check the vacuum lines at the front diff and see if the actuator is moving fully.

Over on ford-trucks.com there seems to be some good topics on the issue.

Are there vacuum lines? I was under the impression that the A4wd trucks (1999.5 - 2002) did not have a front axle disconnect and were essentially live axles disconnected at the transfer case?

I just posted a very detailed thread over at ford trucks with the sa,e type of questions under the expedition section as I am also running into the same issue and there seems to be quite a bit of conflicting info.