Transfercase problem
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New User
Joined: Feb 2011
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Transfercase problem
I have an 02 f350 auto with 7.3 and automatic 4wd switch. The problem comes when I try to pull something in 4wd. I tried to pull 02 2500 out of the mud. I put it in 4wd high put it in gear and nothing. The engine roared and no movement, not even spinning of tires. This has happend twice. I had the hubs in automatic any thoughts on the problem???
Lead Driver
Joined: Sep 2007
Posts: 8,180
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From: Scio, OR
Are you saying NO tires spun? Not even the rear ones? Or are you saying the front's didn't spin.
If no tires spun, you've got a broken transfer case. If the rears spun but not the fronts, then you either have a t-case not shifting, or hubs not locking. Did your 4x4 light come on?
If no tires spun, you've got a broken transfer case. If the rears spun but not the fronts, then you either have a t-case not shifting, or hubs not locking. Did your 4x4 light come on?
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New User
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To get it moving I put it back in 2wd. It leaked a little tranny fluid. I took it to get the tranny rebuilt. The mechanic had it a few days and called me back and said the tranny is fine, and there was no need for a rebuild. Yes the 4x4 light was on. I believe it must be a broken transfer case.
Lead Driver
Joined: Sep 2007
Posts: 8,180
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From: Scio, OR
If the rear wheels are not turning, and the transmission is OK, the transfer case is broken. Although I have to admit I cannot imagine a failure scenario where the rear wheels would turn with the t-case in 2WD, but not with the t-case in 4WD.
Laughing Gas
Joined: May 2008
Posts: 939
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From: Central Kansas
I know very little about the auto transfer case, but is it possible the shift motor isn't locking all the way and is essentially in neutral like a manual t-case?
Lead Driver
Joined: Sep 2007
Posts: 8,180
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From: Scio, OR
I was wondering that myself. There is no neutral position as far as the switch is concerned. But I don't know if that means the transfer case doesn't have one. Theoretically, there could be a neutral position that the 4WD control module simply commands the shift motor to skip over. If that's the case, it is conceivable that an out of alignment shift motor, or maybe one with defective encoder switches, could allow the transfer case to slip into neutral.
Frankly, other than inspecting the shift motor for damage, this is something I wouldn't want to try to diagnose myself. It's pretty far out of my league.
Frankly, other than inspecting the shift motor for damage, this is something I wouldn't want to try to diagnose myself. It's pretty far out of my league.
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< Samantha...my Co-Pilot
Joined: Dec 2001
Posts: 768
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From: Fallon, Nevada
To get it moving I put it back in 2wd. It leaked a little tranny fluid. I took it to get the tranny rebuilt. The mechanic had it a few days and called me back and said the tranny is fine, and there was no need for a rebuild. Yes the 4x4 light was on. I believe it must be a broken transfer case.
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Laughing Gas
Joined: May 2008
Posts: 939
Likes: 1
From: Central Kansas
I was wondering that myself. There is no neutral position as far as the switch is concerned. But I don't know if that means the transfer case doesn't have one. Theoretically, there could be a neutral position that the 4WD control module simply commands the shift motor to skip over. If that's the case, it is conceivable that an out of alignment shift motor, or maybe one with defective encoder switches, could allow the transfer case to slip into neutral.
Frankly, other than inspecting the shift motor for damage, this is something I wouldn't want to try to diagnose myself. It's pretty far out of my league.
Frankly, other than inspecting the shift motor for damage, this is something I wouldn't want to try to diagnose myself. It's pretty far out of my league.
New User
Joined: Feb 2011
Posts: 6
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From: Arlington, WA
Mind does something simular. I dont have any issue getting the truck into 4WD, niether hi or low. When I take it out of 4WD and go to put it back in gear it grinds. I have to go back and forth from park to drive and reverse a few time before it locks in. I think it is the servo in the T-case that is causing the issue. Just have to get time to look into it more. I would amagine that it could also cause what you are experiancing.
