Can someone explain/ point me to a video on how the front diff works on 99 xlt 5'4l 4wd? I did a search only find how to change fluid. I have the Haynes/ Chilton ( I don't remember which) manual and It explains how my f150 works (vacuum modulator on front diff) but it's not setup that way on exp!!
Newbie , little info 99 xlt, 4wd, 5.4l. when tranny goes in overdrive about 45 mph truck vibrates like driving on washboard road. od off makes it go away. However it doesn't disengage when brake applied.
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