Howdy, Stranger!

It looks like you're new here. If you want to get involved, click one of these buttons!





Ford Expedition 4WD Problems

13»

Comments

  • 2001navia4wd2001navia4wd Posts: 2
    edited April 3
    About 1.5yrs ago I had an emmediate drop in MPG in my Navi. Dropped about 3mpg, and I have been trying to solve it ever since. Now I am here! I have an 01 Navi with A4WD, 4H, 4L. All instrument lights show as if it is working correctly in and out of A4WD & 4H, and I can here it engage when going in and out of 4L. But I do not think it is ever actually coming out of 4H. In A4WD, the front wheels slip/skip when doing a slow tight turn on slightly wet asphalt, or on any dirt/gravel. I've had my front driver side axle (by the tire) make a loud popping noise when turning tight on dirt getting onto the throttle twice over 2 years (so loud that I got out expecting to see something laying on the ground under it). The sunroof leaks when there is a downpoor and it runs down the posts, which has always scared me about electrical issues. And when I've had it in the shop off the ground, all 4 wheels were turning at the same speed while in A4WD. My rear axle started shuttering last spring, and we put in an auburn locker rear end (limited Slip), we did not change the ratio. But the problem was present before that was done. I also think I am in need of new driver side balljoints, as I can hear a clicking from that corner when making slow speed manuevers. I bought the ride with aftermarket wheels on it. 20" rims, I put on new Toyo A/T tires and had them get me sized as close to stock hieght as possible, but still eneded up almost .25" off. Is it possible for it to be stuck in 4H? How do I check it? How do I fix it? Hope that is enough information to get somewhere with this..
  • alwaysfords2alwaysfords2 Posts: 334
    As long as your tires are all the same size, the added height will not effect the A4WD since they are all rotating at the same speed. As far as your description goes there could be any number of things going on. The fact that it isn't doing it on dry pavement suggests it isn't the 4WD locking up. You would be hopping into parking spaces if it was locked in 4WD. I'd suggest maybe CV joints. You are likely to get much better answers than mine over in the FTE website where I see you posted the same question in a number of forums.
  • gilgrauegilgraue Rio Rancho, NMPosts: 7
    edited May 1
    I'm having the same issue. Wife says she was cleaning the inside of our 2002 Expy EB 5.4L V8 and she thinks our son may have messed with the switch in the cab because when she went to the store later that day, she said it was acting funny. She got 2 blocks down the road and turned around and went back home. The switch was switched to 4Lo. I tried several things to get it to switch back to 4AWD (there is no 2WD, just 4AWD, 4H and 4L). Nothing seemed to work. I tried to replaced the transfer case motor. After replacing the transfer case motor, the vehicle has some issues at first (hard to turn and very "jumpy" making sharp turns on concrete and vibrates a lot when getting up to speed) but after a couple blocks it will kick in hard and seems like it is driving normal. At first start up and drive, the front wheels kick in extremely hard and now the 4x4 light by the gauges does not stay lit like before, but now it flashes on and off. After new transfer case motor was installed and it was having these issues, I took it back home, pulled the new transfer case motor off and checked the shaft for the transfer case and it was/is still pointed to A4WD and not pointing to 4H or 4L. I am not sure what else to try. I've read on forums to replace the 4x4 module or the GEM Module (what does GEM stand for??). I'm at a loss and trying to fix myself before taking it to Ford where they are going to charge me $100 just to diagnose the issue. ANY suggestions/advise/tips will be very helpful and much appreciated. Thank you!
  • alwaysfords2alwaysfords2 Posts: 334
    It will not go into 4Lo by just turning the switch. If you don't follow the procedure it won't do it - it has to be running in neutral to make that shift. The A4WD kicking in starts with the speed sensors, if you have one that is going bad it could be sending the signal to make it kick in. I think the first thing you should do is pull the fuse for the A4WD. That will take the speed sensors out of the mix and make it should act like a 2WD. If it doesn't, your issue is elsewhere. You want fuse 104 under the hood.
  • metallicusmetallicus Posts: 2
    Ok so I have a 99 e petition that when I turn it shakes and pops and vibrates all over the place. I unplug the transfer case and remove fuse 104and it still does it. I had someone else drive and I got out and looked and I could see the transfer case was shaking and banging all over during a turn. So what does this mean I need a new transfer case or is it my rear end doing it or what?
  • metallicusmetallicus Posts: 2
    I took the front drive shaft out and now problem is gone so now what
  • alwaysfords2alwaysfords2 Posts: 334
    Sounds like the transfer case is the culprit.
  • gilgrauegilgraue Rio Rancho, NMPosts: 7

    It will not go into 4Lo by just turning the switch. If you don't follow the procedure it won't do it - it has to be running in neutral to make that shift. The A4WD kicking in starts with the speed sensors, if you have one that is going bad it could be sending the signal to make it kick in. I think the first thing you should do is pull the fuse for the A4WD. That will take the speed sensors out of the mix and make it should act like a 2WD. If it doesn't, your issue is elsewhere. You want fuse 104 under the hood.

    I've tried pulling the fuse with no change in the problem. I'm at a loss at this point. So far, I've replaced transfer case motor, rear speed sensor, and the 2 sensors that are located at the transfer case motor (one is directly behind the transfer case motor and the other is to the right of the transfer case motor). The sensors were replaced based off of what FORD told me and what I've read online but so far no change in the issue...
  • alwaysfords2alwaysfords2 Posts: 334
    Sounds like your transfer case is mechanically locked up.
  • gilgrauegilgraue Rio Rancho, NMPosts: 7
    Is there anything I can do to fix this? The shaft that connects to the transfer case motor (rectangular shaft that points to 2WD, 4H, 4L) seems like it may be able to be turned by hand but the notch in the transfer case motor itself that the shaft connects to does not line up with the shaft itself (triangular shaft points to 2WD but the transfer case motor itself is stuck on 4H. Is there a way to get the transfer case motor to switch to 2WD to line up with the shaft that goes into the transfer case motor???????
  • gilgrauegilgraue Rio Rancho, NMPosts: 7
    I'm at a loss and trying to get it fixed myself before having it towed to FORD who will charge me $100 just to diagnose the issue......
  • alwaysfords2alwaysfords2 Posts: 334
    You could take the drive shafts out.
  • As long as your tires are all the same size, the added height will not effect the A4WD since they are all rotating at the same speed. As far as your description goes there could be any number of things going on. The fact that it isn't doing it on dry pavement suggests it isn't the 4WD locking up. You would be hopping into parking spaces if it was locked in 4WD. I'd suggest maybe CV joints. You are likely to get much better answers than mine over in the FTE website where I see you posted the same question in a number of forums.

    Hi Guys, I wanted to give you guys the update on my 01 Navi. See original post above.

    -alwaysford2, you were correct. Shortly after I posted on here my ABS dash light started coming on also. I took it to the dealer later in April to get the code read, and they told me to replace my speed sensors. After replacing all of the speed sensors I still had the ABS light on, and rather than paying the dealer more money to chase the problem, I decided to go to my regular mechanic (the old timer that we all know through someone) in May. He reads the code, speed sensor code again, then he walks to all 4 wheels and pulls and prys on them with a breaker bar. He follows that up with asking me if I'm hearing any noise from that front right side that I mentioned in my original post, "Yeah I have actually" I told him. To the point, the front driver side CV joint and bearing were going out, which was causing the ABS light to come on and the speed sensor to misread, which was also causing my ride to go in and out of 4WD. I had both sides on the front replaced (Whole assembly: bearings, sensors, cv joints), and I am now rolling smooth again in all situations. I got back a little over 1mpg with that, but I followed that up with new coils and plugs which got me back another 2.5,pg, so I'm back to a bearable 15.8hwympg avg.

    Hope that helps someone that reads this in the future.
13»
Sign In or Register to comment.
Ford Expedition 4WD Problems - Page 3 - Car Forums at Edmunds.com