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2001 4x4 will not engage

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Old 02-15-2007, 12:01 AM
Junior Member
Join Date: Feb 2007
Posts: 1
2001 4x4 will not engage

I have read the post on here about 4x4's not engaging. I have just bought a 2001 Ford F150, maual 4x4 engagement. I have the truck on my lift so that I can start the truck and let the wheels turn freely. when I put the truck in 4h and put truck in gear the drive shaft turns but makes a light grinding noise, and the front wheels won't lock in. I checked the actuater on the dif and it seems to be engaging(moving back and forth). I attempted to drive the truck and put it in on th efly and it still does not engage. What could this grinding noise be, or what else should I check. any help would be greatly appriciated.
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Old 02-16-2007, 09:40 PM
Senior Member
Join Date: Aug 2000
Location: San Antonio, Texas
Vehicle: 2002 Ford F-150
Posts: 314
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Sounds like the actuator arm inside the diff is broken.

I have never seen one, but I am told it is similar to a transmission shifting fork.
I hope you find this post helpful and good luck!

The Saint

2002 F-150 S/C FX4 4x4
5.4 auto.
Magnaflow si/do.
K&N filter.
replaced BGF's @ 77K with Bridgestone REVO's. Nice ride.
SIRIUS (also worth every penny)
XCAL2 = Intalled and LOVING IT!
Underdrive Pulley's - REMOVED!


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