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  #1  
Old 09-17-2010, 11:41 PM
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Changing the rear differential gear oil

I am thinking about changing my rear axle gear oil in my 2003 F250 i was wondering if anybody had a good way to put the oil back in the differential. I have an aftermarket diff cover and it doesnt have any plugs on it to put the oil back in, im a little stumped on how to go about it. Any suggestions would be great.

Also how can i tell which rear axle i have in my truck, i dont have the axle tag because of the aftermarket diff cover?
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  #2  
Old 09-17-2010, 11:43 PM
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Re: Changing the rear differential gear oil

you dont have a fill plug? That doesnt seem possible!
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I change my HPOP oil, the oil does circulate with the regular oil, it doesn't cycle as often and does get dirty sooner.
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Old 09-17-2010, 11:44 PM
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Re: Changing the rear differential gear oil

There is a plug in the side of the pumpkin on the drivers side. It's a 3/8" ratchet square plug. pull it out, fill it up until gear oil starts to come out, put the plug back in.
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Old 09-19-2010, 03:33 AM
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Re: Changing the rear differential gear oil

you can fill them through the speedo sensor hole as well. My flatbed has a goose-neck ball under a 14" or so square door in the bed, so that works real well for me
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Old 09-21-2010, 08:05 PM
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Re: Changing the rear differential gear oil

The OEM diff cover has no fill plug, drain plug, or magnet attached. To drain you remove the cover. To fill, you use the fill plug on the front of the case near the pinion.
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