F350 2003 7.3 DRW Oil Change - Ford Powerstroke Diesel Forum
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Old 08-05-2009, 01:12 AM
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F350 2003 7.3 DRW Oil Change

I have a 2003 4x4 F350 DRW 7.3l with no owners manual. It has 130,000km's. I would like to change all the oils in the tranny, rear end, transfer case etc. Can some one give me the quanitity of oils that i would need for each and what you would recommend for types of oils. Iam also looking at replacing my eng oil with synthetic and would like to no a good replacement.Any help would be appreciated.
thanks
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Old 08-05-2009, 11:08 AM
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15 qts of the oil of your choice. I use Valvoline Extreme Blue. Tell you the truth I can't tell the difference between that and plain ol Rotella honestly so next time I'll save my money and go back to dino.

Trans, I don't know I had a shop flush and change mine.

I did the rearend the other day and it took almost 5 quarts of Mobile1 75-140 and 8oz's of friction modifier. The front should only be alittle over 3qts of 75-90 and no fm. The transfer case I haven't done yet but I think its only a couple of qts of ATF. Look in the maintenence section and there is a write up on all of it with good pics also.
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Old 08-05-2009, 12:11 PM
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I think this is right.....

CAPACITIES
Engine, with filter..........15.0 quarts[1]
Cooling System, Initial Fill..........33.0 quarts
Automatic Transmission, Total Fill
4 speed 26 plate 4R100..........18.0 quarts
4 speed 20 plate 4R100..........17.0 quarts
Manual Transmission, 5-SPD Mazda..........7.6 pints
Manual Transmission, 5-SPD ZF..........6.8 pints
Manual Transmission, 6-SPD W/ OCOOL..........13.0 pints
Manual Transmission, 6-SPD W/O OCOOL..........12.0 pints
Differential, Front..........5.9 pints
Differential, Ford 10.5 ring gear Rear..........7.0 pints
Differential, Dana 135 Rear..........31.0 pints
Differential, Dana 80 Rear..........8.4 pints[2]
Transfer Case,..........4.0 pints
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Old 08-05-2009, 12:12 PM
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The trans should only take Mercon/Dexron III , not Mercon V, this is still available at Napa as ATF, they can't put Mercon on the label because Ford owns it. You will need 21-24 quarts for a complete flush. Don't put 8 oz of modifier in the rear end if you have LS!!!! This is why Ford's limited slip get's a bad reputation, add 2-3 oz and do some tight figure eights in a parking lot, if you hear chatter add 1 oz at a time until the chatter goes away and your LS will work as designed.

NCH
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Old 08-06-2009, 01:04 AM
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Thanks guys for the help. Hopefully I can get some time to do the much needed maintenance.
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Old 08-06-2009, 08:18 AM
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Don't put friction modifier in if you don't have a limited slip rear end!
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