1991 Ford Explorer 4 Wheel drive engagement

Tiny
HORTTEACHER
  • MEMBER
  • 1991 FORD EXPLORER
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 91,000 MILES
The 4 wheel drive has been working just fine until recently. The car is equipped with push button 4 wheel drive. I was having trouble with it engaging when I pushed the button on the dash for 4 wheel drive. I purchased new lock out hubs which allow me to manually lock the hubs in when I want 4 wheel drive. They work perfectly. Now all of a sudden I cannot get the car to go into 4 wheel drive. Several people seem to think there is a sensor problem but I do not know where to look for that. Someone else said there is a short somewhere. Can you give me a clue? Thanks
Friday, February 6th, 2009 AT 6:12 AM

2 Replies

Tiny
MASTERTECHTIM
  • MECHANIC
  • 4,750 POSTS
When you push the button what happens? I find mostly it is the motor on the transfer case itself that is bad not allowing transfer case to actually shift from 2 to 4. They have just come out with a aftermarket motor for under 100 bucks so you dont have to spend the 450 the dealer wants. Try tapping the motor on the transfer case with a hammer when someone else pressed it into 4wd and see if it shifts, if it does then replace motor
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Sunday, February 8th, 2009 AT 7:42 AM
Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS


https://www.2carpros.com/forum/automotive_pictures/62217_transfer_Case_1.jpg



https://www.2carpros.com/forum/automotive_pictures/62217_shiftmotor_1.jpg


If it doesnt work after hitting on it,disconnect motor and apply 12V and ground on the large orange and yellow wires going to motor.Reverse power and ground a few times to run motor back and forth.Usually works,contacts inside motor get corroded.
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Sunday, February 8th, 2009 AT 7:52 AM

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