Ford F250 rear diff fluid type/amount
Posting Guru
Joined: Apr 2000
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From: NorCal
For a F-250 / 350 with the 10.50 inch axle, you need...
3.5 quarts (= 6.9 pints) of Motorcraft SAE 75W-140 High Performance Synthetic Rear Axle Lubricant (Ford Part Number XY-75W140–QL)
It runs about $10 a quart from the dealer.
Be sure to add 8 oz. of Additive Friction Modifier (Ford Part Number XL-3) if you have a Limited Slip differential. Noticeable if you have a L (ie. 3L73 or 4L10) in the ratio on the housing tag.
3.5 quarts (= 6.9 pints) of Motorcraft SAE 75W-140 High Performance Synthetic Rear Axle Lubricant (Ford Part Number XY-75W140–QL)
It runs about $10 a quart from the dealer.
Be sure to add 8 oz. of Additive Friction Modifier (Ford Part Number XL-3) if you have a Limited Slip differential. Noticeable if you have a L (ie. 3L73 or 4L10) in the ratio on the housing tag.
Last edited by cgl; Mar 16, 2007 at 06:55 PM.
Fleet Mechanic
Joined: May 2005
Posts: 1,567
Likes: 3
From: Chattanooga
So you say. Mine is new and it doesnt feel like it works either. The guy that rebuilt mine says the only difference of our and the ol 80s style is the disk brakes and the fact they put in synthetic.
Post Fiend
Joined: Jun 2006
Posts: 5,497
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From: Central, Al
cgl is right it is 7pints I copied and pasted from the wrong line, also this note in the manual
Service refill capacities are determined by filling the axle to the bottom of the filler hole. On Traction-Loc® axles, always add friction modifier first.
Service refill capacities are determined by filling the axle to the bottom of the filler hole. On Traction-Loc® axles, always add friction modifier first.
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Cargo Master
Joined: Jun 2003
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From: Ardenvoir, Washington
My manual says if you have a Dana 80 to use 75W90 Premium "Synthetic" lubricant along with the friction modifier. If you have Dana 135 to use 80W90 Premium lubricant along with the friction modifier. I guess the "Ford" rear in, use the 75W140 High performance synthetic along with the friction modifier.
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Posting Guru
Joined: Apr 2000
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From: NorCal
Originally Posted by amiller93
...also this note in the manual
Service refill capacities are determined by filling the axle to the bottom of the filler hole. On Traction-Loc® axles, always add friction modifier first.
Service refill capacities are determined by filling the axle to the bottom of the filler hole. On Traction-Loc® axles, always add friction modifier first.
Originally Posted by clintbonnie
My manual says if you have a Dana 80 to use 75W90 Premium "Synthetic" lubricant along with the friction modifier. If you have Dana 135 to use 80W90 Premium lubricant along with the friction modifier. I guess the "Ford" rear in, use the 75W140 High performance synthetic along with the friction modifier.
Last edited by cgl; Mar 16, 2007 at 07:07 PM.
Post Fiend
Joined: Feb 2007
Posts: 14,541
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From: Dallas-Ft. Worth
My limited slip seems to work -- when I break loose I get both rear tires leaving marks, not just one. Limited slip on my 'stang was the same. My Ranger was a non-limited slip and it was definitely a one-wheel-peel truck...
Joe
Joe
Post Fiend
Joined: Jun 2006
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From: Central, Al
Post Fiend
Joined: Feb 2007
Posts: 14,541
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From: Dallas-Ft. Worth
Originally Posted by amiller93
This one http://guzzle.rbmicro.com/rdiff.html
Elder User
Joined: May 2006
Posts: 679
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From: Mesa, AZ
Quoting from Guzzle: "The Sterling 10.5 will require 6.9 pints (3 1/2 quarts) of synthetic 75W-140 gear oil and if yours is a limited slip differential, pickup 4 oz of Ford's XL-3 Friction Modifier."
How exactly do you know if your is limited slip?
How exactly do you know if your is limited slip?