99 expedition 4x4 problem
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Senior User
Joined: Mar 2004
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From: Mn
99 expedition 4x4 problem
My axle wont engage i need 4x4 while it's slippery would it cause problems to just zip tie the diff engaged? I used to run 24/7 with my hubs locked and never had problems. Im supposed to have automatic 4x4 but the rear diff speed sensor is bad so its basically 2wd
Logistics Pro
Joined: Jan 2001
Posts: 3,740
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From: Central NYS
Why not replace the rear diff speed sensor so the A4WD works?
Why won’t your front axle engage?
I don’t believe you can lock/unlock the front hubs in 1999.
If you force the front diff to engage, the front axle won’t receive power because the transfer case electronic clutch won’t be energized.
Why won’t your front axle engage?
I don’t believe you can lock/unlock the front hubs in 1999.
If you force the front diff to engage, the front axle won’t receive power because the transfer case electronic clutch won’t be energized.
Logistics Pro
Joined: Jan 2001
Posts: 3,740
Likes: 37
From: Central NYS
Why not replace the rear diff speed sensor so the A4WD works?
Why won’t your front axle engage?
I don’t believe you can lock/unlock the front hubs in 1999.
If you force the front diff to engage, the front axle won’t receive power because the transfer case electronic clutch won’t be energized.
Why won’t your front axle engage?
I don’t believe you can lock/unlock the front hubs in 1999.
If you force the front diff to engage, the front axle won’t receive power because the transfer case electronic clutch won’t be energized.
Logistics Pro
Joined: Jan 2001
Posts: 3,740
Likes: 37
From: Central NYS
But if you do have a 2WD position on your selector switch, you may just have a vacuum leak that is preventing the front axle actuator from engaging the front axle.
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Fleet Owner
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Is there a vacuum actuator attached to a lever on top of the front differential?
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Thread Starter
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Senior User
Joined: Mar 2004
Posts: 131
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From: Mn
Found the problem the driver side front axle flange (cv shaft goes from hub n bolts to round flange thats approximay 1 inch from diff) the short axle that comes out of the differential doesn't stay in place in the differential. Ut basically just falls right out the side, the only thing keeping it from falling all the way out is cv shaft doesnt compress far enough to let it come out all the way. I can put it right back into place, it engages the splines or what evers inside the diff but nothing is keeping it from sliding back out. I slide it into place, and switched it to 4x4 and 4wd was engaged, now i just have to figure out how to keep axle in the diff. If this was a rear end id be 100% sure a c clip came off the axle.
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Oct 4, 2004 03:59 PM