Do I have this diff service correct?
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Cross-Country
Joined: Feb 2018
Posts: 76
Likes: 3
From: Gallatin, Tn.
Do I have this diff service correct?
Hello all,
I’ve got a 2015 F250 w/6.7 engine. Looking thru the diesel supplement in regard to differential fluid maintenance, the rear differential does not ever need to be serviced, unless the axle has been under water. If I elect to change the fluid, the recommendation is 75W-140 plus 8oz of friction modifier. Do I have this correct?
I’ve got a 2015 F250 w/6.7 engine. Looking thru the diesel supplement in regard to differential fluid maintenance, the rear differential does not ever need to be serviced, unless the axle has been under water. If I elect to change the fluid, the recommendation is 75W-140 plus 8oz of friction modifier. Do I have this correct?
Laughing Gas
Joined: Nov 2010
Posts: 790
Likes: 254
If you have a limited slip axle, yes that's correct.
If you have the electronic locking differential (the 4wd **** pulls out), you do not need the friction modifier.
If you have the electronic locking differential (the 4wd **** pulls out), you do not need the friction modifier.
Rear Axle (1)
Ford Part Name
- Motorcraft SAE 75W-140 Synthetic Rear Axle Lubricant
Ford Part Number
- XY-75W140-QL
Ford Specification
- WSL-M2C192-A
(1) Add 8 oz. (236 ml) of Additive Friction Modifier XL-3 or equivalent meeting Ford Specification EST-M2C118-A for complete refill of limited slip Ford axles. Ford design rear axles contain a synthetic lubricant that does not require changing unless the axle has been submerged in water.
Front Axle .................... 5.8 Pints (2.8 Liters)
Rear Axle (1) .................... 6.9 Pints (3.3 Liters)
(1) Add 8 oz. (236 ml) of Additive Friction Modifier XL-3 or equivalent meeting Ford Specification EST-M2C118-A for complete refill of limited slip Ford axles. Ford design rear axles contain a synthetic lubricant that does not require changing unless the axle has been submerged in water.
Ford Part Name
- Motorcraft SAE 75W-140 Synthetic Rear Axle Lubricant
Ford Part Number
- XY-75W140-QL
Ford Specification
- WSL-M2C192-A
(1) Add 8 oz. (236 ml) of Additive Friction Modifier XL-3 or equivalent meeting Ford Specification EST-M2C118-A for complete refill of limited slip Ford axles. Ford design rear axles contain a synthetic lubricant that does not require changing unless the axle has been submerged in water.
Capacities
Front Axle .................... 5.8 Pints (2.8 Liters)
Rear Axle (1) .................... 6.9 Pints (3.3 Liters)
(1) Add 8 oz. (236 ml) of Additive Friction Modifier XL-3 or equivalent meeting Ford Specification EST-M2C118-A for complete refill of limited slip Ford axles. Ford design rear axles contain a synthetic lubricant that does not require changing unless the axle has been submerged in water.
Fleet Mechanic
Joined: Dec 2015
Posts: 1,521
Likes: 412
From: Washington Coast
Check the differential code on the door tag. There are 3 different differentials that were available, open, limited slip, and locker. The limited slip is the only one that requires friction modifier.
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97ExpGuy
1997 - 2006 Expedition & Navigator
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