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Front and rear Diff lube type and Qty?

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Old

Apr 20, 2024 | 05:17 PM

#1

thebigredarcher

Thread Starter

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4wd Low

Joined: Jul 2012

Posts: 11

Likes: 1

Front and rear Diff lube type and Qty?

Hey all:

Looking to confirm type and quantity of lube for my 2021 F250SD. I have look online and through forums but come up with a healthy does of confusion.

Leaning towards Amsoili 75/90 and 3qts front and rear.

Driving style: Daily driver, with the occational 5th wheel towing.

I have seen in many of the other threads "in the manual"...Where in what manual are people reading from because my manual doesn't say a thing.

TBRA

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Old

Apr 20, 2024 | 05:21 PM

#2

4wd6.7L

Lead Driver

Joined: Dec 2020

Posts: 8,640

Likes: 2,435

It is in the manual under "Capacities and Specifications". The rear diff fluid recommended by Ford will depend on which rear you have.

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Old

Apr 20, 2024 | 08:30 PM

#3

mattymax

Fleet Mechanic

Joined: Mar 2006

Posts: 1,519

Likes: 134

AMSOIL

Go on their website and put your vehicle info in. It will give you what fluid you need

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Old

Apr 20, 2024 | 09:53 PM

#4

thebigredarcher

Thread Starter

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4wd Low

Joined: Jul 2012

Posts: 11

Likes: 1

4wd6.7L

Thank you for pointing the way. I was looking for lubricant, oil, differential, you name it. Looks like I'm going with 75W90 front and rear.

Thanks again
TBRA

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Old

Apr 20, 2024 | 09:55 PM

#5

thebigredarcher

Thread Starter

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4wd Low

Joined: Jul 2012

Posts: 11

Likes: 1

Mattymax:

Thanks for the advice. I went to the website and entered my truck but it gave me all the options for that truck. I was able to narrow it down to 75W90

TBRA

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Old

Apr 21, 2024 | 09:02 AM

#6

OBS460

Logistics Pro

Joined: May 2022

Posts: 4,295

Likes: 2,418

From: Everywhere and nowhere

I dont know what rear axle you have but the front takes 2.75 quarts. Buy a Lube Locker gasket and you don't have to ever mess with RTV again.

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