Changing the rear differential gear oil - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 5 (permalink) Old 09-18-2010, 12:41 AM Thread Starter
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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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post #2 of 5 (permalink) Old 09-18-2010, 12:43 AM
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Re: Changing the rear differential gear oil

you dont have a fill plug? That doesnt seem possible!

MINE:08 F-250 CCSB king ranch erics tunes livewire
99: sclb 6 speed, 4" lift,4" exhaust, EB
99 F-450: ccfb Boss v plow. 6 speed 5" ex,EB
1985 Peterbilt 359 Big cam III Tuned up a little
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Originally Posted by prheitz View Post
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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post #3 of 5 (permalink) Old 09-18-2010, 12:44 AM
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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.

Early 99 F-350
4" lift on 33's. Daily Driver/ Plow truck.
Swamp's Gen3, 300/200's, Tuning, 76mm Sledgehammer. BTS. Fuel system, ARP's, P-Rods, 910's, and a few other things. Stock Block.

New truck:
2009 F-350, 5.4L, 4" lift on 35's
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post #4 of 5 (permalink) Old 09-19-2010, 04:33 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

Early '99 ccsb 7.3l 4x4 6spd
All Stock Except
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Brush guard w/ fog and driving lights
seat covers
after market floor mats
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Rear license plate light is out

Originally Posted by erikclaw View Post
Those hairy bastards are scary up close!

Originally Posted by fordfreak4life View Post
with all the smoke, power and wheelie popping you might accidently park on a honda
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post #5 of 5 (permalink) Old 09-21-2010, 09:05 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.

2000 F350 SRW, 4wd, CCSB, PSD
Lowered rear end to F250 height, 4" exhaust w/ muff, foil delete, AIH delete, Ford AIS intake, tru-cool trans cooler, autometer under dash pod and gauges, Mile Marker hubs, 04 headlights, soft tonneau

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