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How do I disengage 4X4 locked in Low?

Tiny
RAFDO
  • MEMBER
  • 1998 FORD EXPEDITION
  • 78,000 MILES
98 Ford Expedition 5.4L locked in Low. Tried usual recommedations, neutral-brake, etc, backed up, disconnected wire to tranfer case, checked fuses in cab & under hood. Lights indicate 4x4 Low even with 23 & 24 removed? Out in country so towed to Ford dealer who won't give much info or talk to mechanic. Wants to replace ECU module F85Z-14B205-KAS for $900 w labor?$$?
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Monday, October 10th, 2011 AT 10:12 PM

9 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
It sounds like he wants to change the GEM module. This is one of the controls for the transfer case. Did he check to make sure the motor is not failing? There is a motor on the case that is a common failure.

Roy
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Tuesday, October 11th, 2011 AT 11:10 AM
Tiny
RAFDO
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  • 5 POSTS
Roy, thanks for responding, Ford dealer 50 miles away, service says mechanic is too busy to call. Probably read the computer & never looked. Is disconnecting the battery worth trying first or disengaging low possible? They may charge the same for everything. Wish I was mechanically inclined & not my only vehicle.
Richard
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Tuesday, October 11th, 2011 AT 5:10 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Ok, yes, you can try. It will re boot the GEM module but may not work.
You can also try raising the car taking the pressure off the hweels and see if that frees up the motor.

Roy
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Tuesday, October 11th, 2011 AT 5:36 PM
Tiny
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  • 5 POSTS
Is there a simple way a mechanic can disengage from 4x4 if I don't use 4x4? At Dealer, only access is via mechanic
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Tuesday, October 11th, 2011 AT 5:58 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
If you could disable the motor on the case in the high position.

You dont need a dealer, go to a local shop. They are cheaper and in a lot of cases, much better

Roy
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Tuesday, October 11th, 2011 AT 6:09 PM
Tiny
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  • 5 POSTS
Thanks, what are the steps? Limited options being long distance
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Tuesday, October 11th, 2011 AT 8:44 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Motor has to be removed from the case and see what position it is in. There is a sun gear that slides inside and it must change positions. This is best done by someone familiar with transfer cases.

Roy
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Tuesday, October 11th, 2011 AT 8:49 PM
Tiny
RAFDO
  • MEMBER
  • 5 POSTS
Thanks a lot. As a mechanic, which recent model awd/4x4 suv would you buy for occasional 3,000-5,000lbs towing, longevity, dependable.
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Tuesday, October 11th, 2011 AT 9:01 PM
Tiny
ASEMASTER6371
  • MECHANIC
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Toyota Tundra, extremely reliable, low frequency of repair. A little pricy but worth it.

Roy
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Tuesday, October 11th, 2011 AT 11:25 PM

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