hitting noise

[msparks]

hey people,
i have a 95 explorer 4x4 4.0, as i reduce speed coming to a stop i get this hard hitting sound, it sounds like it's coming from the back differential but at times it sounds like it's in the center area under the truck, i do have the blinking O/D light, im wondering if anyone can help me figure if it's the tranmission,drive shaft ( u-jonts), or the differential? plz help

 

[1Aauto]

If the O/D is on you may want to shut it off and see what happens. Also check the tranny fluid level.

 

[msparks]

If the O/D is on you may want to shut it off and see what happens. Also check the tranny fluid level.

i have checked the fluid, ( top off) and a matter of fact i had just changed the fluid right before this happened. -ty for the reply-