03 Exp EB Please help
Thread Starter
|
Senior User
Joined: Jul 2007
Posts: 184
Likes: 0
From: PA
Some but not much. Even in 2H the front axle turns. The difference when you switch out of 2H to A4WD is that now the carrier assembly in the front differential turns, as well as, the front driveshaft. Turning those does add some load to the engine output, and any additional load will cut into your MPG.
MPG dropped down to about 10mpg
New User
Joined: Mar 2007
Posts: 16
Likes: 0
I had a similiar issue with my '03 Expy FX4, i'd be driving down the road and a very loud grinding/roar would come from the front. Mine ended up being the driver's side vaccum-actuated hub. My service dealer told me on the Expys, the vaccum at the hub is always on, it's when you turn it into A4WD or 4HI or 4LO when the vaccum turns off (I guess different from the F150's), and that is what "locks" the front end in. Mine cost about $100 for the hub actuator.
Hope this helps.
Hope this helps.
Thread Starter
|
Senior User
Joined: Jul 2007
Posts: 184
Likes: 0
From: PA
I have an 03 Exp EB that is making noises and am hoping you guys can help me out. If have it in 2WD there is what sounds like LOUD road noise. If I switch to A4WD the noise goes away. Since it goes away in A4WD it can't be road noise. If I do the switch while driving down the road, there is a loud clunking noise. Gas mileage sucks in A4WD so I would like to be able to drive it in 2WD. Also, if you switch the selector to 4Lo the light doesn't come on anymore. Any ideas would be much appreciated. I am hoping it is an easy fix that my hubby can take care of since this car is a major sore spot for him. If you remember back, this is the one the dealer did as a swap for my 99 that they totalled.
Thanks!!!
Thanks!!!
Update:
Hubby took it to a repair shop yesterday. The guy says that he thinks it is the motor on the side of the transfer case that pulls it in and out of 4WD, does that make any sense to you guys. From some of your posts it seems like that is supposed to be vacuum acivated????
Fleet Owner
Joined: Apr 2008
Posts: 24,316
Likes: 5,127
From: 0,0,1
The motor he's referring to is the shift motor down on the transfer case and it's electrical, not vacuum. That motor does just what he says it does.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Thread Starter
|
Senior User
Joined: Jul 2007
Posts: 184
Likes: 0
From: PA
Ok. well he is saying that will do the trick and should cost a couple hundred bucks. WHat do you think??
Thread Starter
|
Senior User
Joined: Jul 2007
Posts: 184
Likes: 0
From: PA
I just have trust issues with this mechanic. He is a friend of my husband's but when they went out for a road test to hear the noise. They stopped at another shop to get another opinion twice before they came back to tell me what they thought it was.
What fluids do you use to change tthe fluid in the transfer case? He told us to buy some from the local Chevy dealer. Does that make sense to you guys?
What fluids do you use to change tthe fluid in the transfer case? He told us to buy some from the local Chevy dealer. Does that make sense to you guys?
Thread
Thread Starter
Forum
Replies
Last Post
99Exp
1997 - 2006 Expedition & Navigator
6
Mar 23, 2012 05:03 AM