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1999 F150 Mechanical 4WD axle does not engage
Posted to Technical Discussion Forum on 10/1/2017 17 Replies

I have searched here for hours and it's either Electric 4WD or symptoms don't match. Transfer case works because the front driveline moves when engaged. Front axle works because I can swap the disengage vacuum line to the engage port and the axle shifts.

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car Vehicle Data

1999 Ford F-150 5.4L

Engine5.4 L
Trans4-speed Automatic (Electronic)

car Vehicle Data

1999 Ford F-150 5.4L

Engine5.4 L
Trans4-speed Automatic (Electronic)