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Old 11-05-2009, 20:38   #1 (permalink)
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New Here, Couple of question!

I just picked up a 98 Expedition and I noticed that it probably could use an oil change. So while I was underneath I noticed that my 4.6l engine uses a remote oil filter so that the actual filter is located just behind the front bumper which is pretty convenient to change but not sure how it really would benefit rather than being located closer to the drain plug. Anyways something that I was curious about was I found what appears to be a Plug for an outlet... much like ones that are found on diesels for their glow plugs. It's located near the front right about the front drivers side tow hook. Is this common to have on these engines? It makes no sense to me why this would be equipped on these vehicles unless it's a method to charge the battery if it's dead near an outlet? Anyone have any ideas?
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Old 11-05-2009, 21:22   #2 (permalink)
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Re: New Here, Couple of question!

That plug is probably due to the fact that it was from a cold climate somewhere. We had a Dodge Durango with one and found out that it came from Alaska.
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Old 11-07-2009, 07:00   #3 (permalink)
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Re: New Here, Couple of question!

Is there any information on draining the rear differential oil and filling? How many quarts it takes and if there's a drain and fill plug?
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Old 11-07-2009, 07:48   #4 (permalink)
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Re: New Here, Couple of question!

No drain plug. You have to remove the cover to change it. It holds
Motorcraft SAE 75W140 Synthetic Rear Axle Lubricant 2.9-3.1L (5.5-5.8 pints)

According to Fords manual. "Your vehicle’s rear axle is equipped with synthetic rear axle lubricant. Rear axles containing synthetic lubricant are lubricated for life. These lubricants are not to be checked or changed unless a
leak is suspected, service required or the axle has been submerged in
water. The axle lubricant should be changed any time the axle has been submerged in water. Add 118 ml (4 oz.) of additive friction modifier C8AZ-19B546–A, Ford specification EST-M2C118–A whenever the fluid is changed."

"Front axle fluid Motorcraft SAE 75W90 Axle Lubricant 4 x 4 vehicles 1.8-2.0L
(3.5-3.7 pints)"

I would still change it. Don't forget the transfer case. It uses Mercon V.
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Old 11-10-2009, 00:06   #5 (permalink)
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Re: New Here, Couple of question!

the "plug" you found is for an engine block heater and yes it serves the same purpose as on a diesel. it's not for the glow plugs. it is supposed to make the vehicle easier to start in severely cold climates. not absolutely necessary on a gasoline engine, but a definite necessity on a diesel.
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