4X4 wont engage. - Ford Powerstroke Diesel Forum
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post #1 of 12 Old 12-28-2007, 12:41 PM Thread Starter
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4X4 wont engage.

Hey guys, I'm helping my buddy out. He has a 01 F250 5.4L Auto and his 4X4 wont engage. It's the electronic shift on the fly. I can hear the motor on the TC try to engage but the 4X4 light wont come on. I don't think the motor is bad but I don't now why it wont engage. Any suggestions?

"The strongest reason for the people to retain the right to keep and bear arms is, as a last resort, to protect themselves against tyranny in government."
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03 F250 FX4
7.3L 4X4
4-inch Turbo Back Straight pipe.
DIY Tymar intake.
285/75/16 Cooper ST Maxx
181K

Last edited by LPstroker; 12-28-2007 at 12:48 PM.
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post #2 of 12 Old 12-28-2007, 12:43 PM
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check your wires.
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post #3 of 12 Old 12-28-2007, 12:45 PM Thread Starter
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They are all good and clean so is the connection.

"The strongest reason for the people to retain the right to keep and bear arms is, as a last resort, to protect themselves against tyranny in government."
Thomas Jefferson


03 F250 FX4
7.3L 4X4
4-inch Turbo Back Straight pipe.
DIY Tymar intake.
285/75/16 Cooper ST Maxx
181K
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post #4 of 12 Old 12-28-2007, 01:09 PM
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Does it go into 4x4 High? Or no 4x4 at all? Have you checked for any fault codes?

Mike Cleary
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post #5 of 12 Old 12-28-2007, 01:36 PM Thread Starter
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No 4X4 at all. the electric motor sounds like it is trying to engage like 3 times but the 4X4 light doesn't come on. then it stops trying. Doesn't throw any lights or anything. I don't have anything to full codes.

"The strongest reason for the people to retain the right to keep and bear arms is, as a last resort, to protect themselves against tyranny in government."
Thomas Jefferson


03 F250 FX4
7.3L 4X4
4-inch Turbo Back Straight pipe.
DIY Tymar intake.
285/75/16 Cooper ST Maxx
181K
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post #6 of 12 Old 12-28-2007, 01:51 PM
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If you could get codes that would really be helpful. Some things come to mind based on past experience: faulty Xfer case motor, faulty Xfer case front or rear speed sensors. I would recommend diagnostics instead of just swapping out parts. See if you can find someone who can at least retrieve the codes for you.

Mike Cleary
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Automotive Technical Support Services
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post #7 of 12 Old 12-28-2007, 02:01 PM Thread Starter
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but no lights come on like check engine or anything, so would it still throw a code?

"The strongest reason for the people to retain the right to keep and bear arms is, as a last resort, to protect themselves against tyranny in government."
Thomas Jefferson


03 F250 FX4
7.3L 4X4
4-inch Turbo Back Straight pipe.
DIY Tymar intake.
285/75/16 Cooper ST Maxx
181K
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post #8 of 12 Old 12-28-2007, 02:04 PM
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Possibly, yes. If you can find the right scan tool, you should also monitor the contact plate pids to make sure they are switching properly as the different 4x4 requests are being commanded.

Mike Cleary
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post #9 of 12 Old 12-28-2007, 02:27 PM Thread Starter
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thanks for the help buddy I'll update you once I start getting into it a little more.

"The strongest reason for the people to retain the right to keep and bear arms is, as a last resort, to protect themselves against tyranny in government."
Thomas Jefferson


03 F250 FX4
7.3L 4X4
4-inch Turbo Back Straight pipe.
DIY Tymar intake.
285/75/16 Cooper ST Maxx
181K
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post #10 of 12 Old 12-29-2007, 04:16 AM
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check for vacuum leaks as well.... if you havnt used the 4x4 for a while the seals on the hub can get cracked and torn and leak. if yours dont have vacuum... any 4x4 local shop should have a scanner u can use.

99.5/01 F250 SD 4x4 SOF ext. cab short bed
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90,000 on the engine and 253 on the truck
aftermarket:
Intake(DIY/TYMAR)
Foil Delete...(no difference noticed)...
Tires
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Gooseneck hitch
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Tow package
Headlights
Exhaust(kat and muffler delete)
2" leveling kit by AAA spring(local)
tranny w/triple disc tq
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edge juice w/attitude
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where has all my mileage gone....
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