22s check your rear diff!
Cross-Country
Joined: Oct 2021
Posts: 81
Likes: 37
Allow me to describe the noise I hear in more detail. While coasting to a stop at speeds of 25 MPH or so, the noise I hear sounds like a faint police or fire truck siren in the distance, so much so that I've caught myself looking around for an emergency vehicle I may need to avoid only to find none.
Tuned
Joined: Apr 2021
Posts: 388
Likes: 231
This post is what I was waiting for. I'm curious if anyone actually drained each of these drive components and measure the fluids? Does it add up to the owner's manual/Ford recommendations? Picked up my '22 DRW in October and it will get used a lot more when our AF 990 truck camper arrives next month. Hopefully Ford did the right thing and filled these components correctly before we start hauling 4,500lbs in the bed of the truck. I'm fairly confident they did as I never had an issue with the 2018.
Cheers!
Cheers!
So, hope this helps, and apparently no, the correct fill quantity is not level to the fill plug opening.
More Turbo
Joined: Dec 2011
Posts: 739
Likes: 393
I drained my 22 F450 tonight - partly due to this thread, and partly because it seems reasonable to change the oil after initial break in. The Ford maintenance guide to change it at 150,000 miles seems a bit long to me….. Anyuway, I could not reach the fluid level with my pinky. My 11.8 axle calls for 3.78 quarts (including the friction modifier), and that’s about what drained out. When I re-filled with that amount, I could not feel the oil level with my finger.
So, hope this helps, and apparently no, the correct fill quantity is not level to the fill plug opening.
So, hope this helps, and apparently no, the correct fill quantity is not level to the fill plug opening.
Now I wonder if there will be any issues on those axles that people are adding an extra quart, thinking it's underfilled.
Laughing Gas
Joined: Mar 2007
Posts: 1,063
Likes: 329
From: Ontario
After seeing the report from Doug Savage, I'd be a little concerned if I went outside and "topped up" my diff using the finger dip method. Seems some added even more than a quart.
Lead Driver
Joined: May 2021
Posts: 5,834
Likes: 3,462
From: Uh oh, CA
So after reading this I went and checked mine yesterday using the “pinky test.” I ended up with a pinky covered in oil so I’m not at all concerned that it’s “under filled.” The best I could tell, it wasn’t at the fill hole, but maybe 1/4 inch below it. And, FWIW, mine is the Dana M275 with 3.31 EL with a production date of 9/12/21. There was a lot of metal on the fill plug magnet, and it does make me want to change it out though…
More Turbo
Joined: Mar 2022
Posts: 537
Likes: 224
Fox,
go for it. I'm curious. I saw another thread on here with a check procedure of the 275/300, and it was even with thr fill hole. That's how I like em...or using Magtecs at the full line which is 3/4" over factory fill.
go for it. I'm curious. I saw another thread on here with a check procedure of the 275/300, and it was even with thr fill hole. That's how I like em...or using Magtecs at the full line which is 3/4" over factory fill.
Lead Driver
Joined: May 2021
Posts: 5,834
Likes: 3,462
From: Uh oh, CA
I'd love to hear what Dana actually has to say on this.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
Mountain Pass
Joined: Feb 2011
Posts: 192
Likes: 30
From: Upstate NY
So after reading this I went and checked mine yesterday using the “pinky test.” I ended up with a pinky covered in oil so I’m not at all concerned that it’s “under filled.” The best I could tell, it wasn’t at the fill hole, but maybe 1/4 inch below it. And, FWIW, mine is the Dana M275 with 3.31 EL with a production date of 9/12/21. There was a lot of metal on the fill plug magnet, and it does make me want to change it out though…
I also searched danas site, but came up with old documents - all saying fill until it is level with the hole, which is how it has been and should continue to be.
Laughing Gas
Joined: Jan 2022
Posts: 1,101
Likes: 503
Mountain Pass
Joined: May 2020
Posts: 204
Likes: 115
From: Zephyr Cove, NV
This whole situation is just ridiculous. If it's not supposed to be filled to the hole, then they need to move the hole down so it can't be overfilled. People have been filling their differentials until it runs out the fill hole for decades.
More Turbo
Joined: Nov 2019
Posts: 550
Likes: 262
From: Northwest CT
Different vehicles, but on my old truck, I alway put in whatever Dana had said. Couldn't touch the level with my finger. Never had a problem in over 180k miles.
I would think too much diff fluid would have the potential to push past the outer axle seals as heat and pressure build up in the diff. Obviously under filled would create more heat and is no good either. At the end of the day, if you put in what the book calls for and you can't touch it with your finger, then you probably weren't meant to.
I would think too much diff fluid would have the potential to push past the outer axle seals as heat and pressure build up in the diff. Obviously under filled would create more heat and is no good either. At the end of the day, if you put in what the book calls for and you can't touch it with your finger, then you probably weren't meant to.
More Turbo
Joined: Nov 2021
Posts: 591
Likes: 320
There is A TON of air space in a diff and they have breathers... You arent taking up all that air space when the fluid heats up. I bet hot fluid level rises about 2-3mm in the diff(enough to coat the magnet on the fill port)...
Lead Driver
Joined: May 2021
Posts: 5,834
Likes: 3,462
From: Uh oh, CA
I haven’t scoured every inch of the 2022 manual, but all I have came across was the amount (3.6 quarts for the 10.8 axle) and the type. At least here it did not indicate a “level” it should be filled to. Regardless, I don’t feel concerned about the level in mine, and until I drain it and refill it I won’t know where that level is.
Fleet Mechanic
Joined: Apr 2015
Posts: 1,641
Likes: 507
From: Phelan CA
Many seem to forget that oil is transfered to the hubs and stays there. That could give an impression that the oil was low.
The main issue is keeping the oil cool, not the quantity. It takes less than an oz of oil to coat the bearings and gear set.
It's the hypoid gear friction that creates heat which will destroy the oil composition leading to failure.
The main issue is keeping the oil cool, not the quantity. It takes less than an oz of oil to coat the bearings and gear set.
It's the hypoid gear friction that creates heat which will destroy the oil composition leading to failure.