Changing rear diff oil-A question

[hank19-1]

93 Explorer-4WD I want to change the rear diff. fluid but I need to make sure where the "filler" hole is. I want to take the cover off and drain the oil. I just got done looking for the filler hole and what I found was a bolt on the top of the diff with a wire connection attached to it. Is this the filler hole and what is the wire connection for? Thanks for the help! John

 

[aldive]

The fill hole should be on the top front side.

Are you going to use synthetic oil?

Good luck ....

 

[RangerX]

It'll be on the front upper driverside of the diff. Look for a plug with a square recessed 'hole'. It takes a 3/8" drive rachet and extension to remove.

 

[ExplorerDMB]

By the way, the wire and all is your speed sensor for the rear wheels! The ABS ring is on the ring gear - you'll see it when you pull the cover!

-Drew