2001 expedition transfer case help please.
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2001 expedition transfer case help please.
2001 FORD EXPEDITION.my truck binds on turns i have removed the 104 fuse still binds removed front drive shaft problem goes away i put the drive shaft back in. i disconnected the wire harness from the transfer case problem is still there.my dash does not indicate i am in a4wd when i select it 4x4 and low 4x4 both light up.any ideas?is this internal problem with my transfer case?
5th Wheeling
Joined: Jan 2016
Posts: 39
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From: Chicagoland, IL USA
For once I can lend some info instead of ask for it. My dad had something similar and what it ended up being was there is a front shaft speed sensor that was acting up. Was causing the AWD system to think I needed to lock up the torque converter when it didn't, and there is the binding. Went through probably the worst service experience ever at a shop that is great for non-electrical 4WD systems but the electronic part of the system they were totally ignorant about (and then handled other things badly on top of that). I'd check there first to see if maybe that's your problem - and if there is a rear shaft sensor might check that as well if the front checks out.
Logistics Pro
Joined: Jan 2001
Posts: 3,740
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From: Central NYS
IIRC, removing fuse 104 removes power to the transfer case's electrically controlled clutch, disabling it. Therefor when in A4WD, a difference in front and rear output shaft speeds should not be able to apply engine power to the front axle. The OP removed fuse 104 and still had binding.
My guess would be that the transfer case shift motor is stuck in 4H, therefore removing fuse 104 would NOT (edited) prevent binding. And removal of the front driveshaft WOULD (edited) eliminate binding.
Hopefully alloro will be along shortly to explain how to determine the shift motor position.
My guess would be that the transfer case shift motor is stuck in 4H, therefore removing fuse 104 would NOT (edited) prevent binding. And removal of the front driveshaft WOULD (edited) eliminate binding.
Hopefully alloro will be along shortly to explain how to determine the shift motor position.
5th Wheeling
Joined: Jan 2016
Posts: 39
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From: Chicagoland, IL USA
I can't remember what I did to get it to the next shop, but from what I remember, even with the fuse pulled I still got binding going around in turns. There is something screwed up on the rear diff though from another shop botched rear end job, so maybe that was it and not xfer case. I wish you luck!
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Should,nt the front clutch be disengaged with the power disconnected? And i get no a4wd indicator light on the dash should i have one when in a4wd?any suggestions on how to further troubleshoot thank you.
5th Wheeling
Joined: Jan 2016
Posts: 39
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From: Chicagoland, IL USA
There won't be any light on the dash when you're in A4WD, that's like the default driving position so no light. My dad's would go into 4HI and 4LO also, it was just that bad sensor causing the bad bind.
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5th Wheeling
Joined: Jan 2016
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From: Chicagoland, IL USA
Perhaps even though power is killed to the transfer case the clutch still has sone engagement somehow?
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Logistics Pro
Joined: Jan 2001
Posts: 3,740
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From: Central NYS
Pull the transfer case shift motor and verify which position the motor is in.
Lead Driver
Joined: Jul 2004
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From: Foothills, CA
So simple stuff first: when was the last time the transfer case fluid was changed or even checked? It is a variable engagement clutch in there, so the fluid does get "used" and is important for it to operate correctly.
I take it the rear end work required a fluid change and if you have a Ltd. slip it requires fluid that already has the limited slip friction modifier additive or you need to add it (Equa-Torque, etc.), otherwise your rear will bind too.
I used Mercon V in the Xfer case and what came out after 40K miles was Black and almost sludgy
I take it the rear end work required a fluid change and if you have a Ltd. slip it requires fluid that already has the limited slip friction modifier additive or you need to add it (Equa-Torque, etc.), otherwise your rear will bind too.
I used Mercon V in the Xfer case and what came out after 40K miles was Black and almost sludgy
Fleet Owner
Joined: Apr 2008
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From: 0,0,1
The front clutch inside the transfer case is broken. Even when in 4hi or 4low the power to the front axle is achieved through the electrically engaged front clutch. Removing power by pulling fuse 104 should completely disengage the front clutch. Since the clutch remains engaged even after pulling the fuse, the problem is that the clutch is mechanically locked.
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