2023 Super Duty Rear Axle

[DTX2023Tremor]

It looks like PPE is working on a diff cover. It's on their website, but showing as out of stock. I've reached out to see when they expect to have them in stock.

2023–2024 Ford SuperDuty Sterling 11.6”– 16 Bolt Heavy-Duty Cast-Aluminum Rear Differential Cover

Upgrade your Ford SuperDuty truck with this PPE Heavy-Duty Cast-Aluminum Differential Cover. 11.6” rear-end, industry-leading efficiency, optimal gear lubrication, and exceptional fluid cooling,

ppepower.com

 

[DTX2023Tremor]

It looks like PPE is working on a diff cover. It's on their website, but showing as out of stock. I've reached out to see when they expect to have them in stock.

2023–2024 Ford SuperDuty Sterling 11.6”– 16 Bolt Heavy-Duty Cast-Aluminum Rear Differential Cover

Upgrade your Ford SuperDuty truck with this PPE Heavy-Duty Cast-Aluminum Differential Cover. 11.6” rear-end, industry-leading efficiency, optimal gear lubrication, and exceptional fluid cooling,

ppepower.com

Just an update... PPE is expecting the diff cover to be available in October.

 

[Gunner77]

2021 250 Gasser. Build date 06/21.

 

[adv_cj]

For me, strength of either axle isn't of concern. My concerns is knowing parts availability in the future for my "Dana hybrid, not really sure what I have" 23 Tremor 6.7HO. Instead of ordering random parts or needing to buy on the spot for trail repairs, would be nice to know what's there. I can't imagine going to most parts stores and getting the correct thing. They already can't operate their systems without knowing your social security, bank routing info, and of course if your vehicle is equipped with AC in order to sell you a bottle of blinker fluid.

 

[04sshd]

So it seems that Banks has yet to sort out the 23+ Diff cover with the HO. I ordered the one that I put on my last 2020 Tremor as it appeared to have the same Bolt Pattern but apparently it does not.

Does anyone know how to properly ID this axle? I'm trying to figure out if it's a Dana or Sterling. It's got 14 bolts, the pattern is almost identical to a Dana m275. Is this the Dana m300?

 

[shermanator2]

It is a Dana. If this is a 2023 Tremor with a 6.7, then we think it is a M300. Sterling 11.6 has 16 bolts so it is not that. Sterling 10.5 has 12 bolts so it is not that. Danas have fill plug in the cover and Sterling have fill plug in the housing. Try a cover for a 2022 DRW F-350. My 2022 F-350 Dually came from the factory with an aluminum cover so if you want to try one of those I can give you my VIN and you can order one from Ford. I do not know if Banks makes one for the M300 or not.

 

[shermanator2]

Additionally, look at this page: https://differentials.com/technical-help-2/differential-identification/ and compare the M275 to the M300. Yours looks exactly like the M300.

 

[Mister Bevilaqua]

So now we think the '23's with the 6.7HO have Dana M300 rear axles and not M275's?

 

[shermanator2]

So now we think the '23's with the 6.7HO have Dana M300 rear axles and not M275's?

Yes. I went back and looked at some of the earlier posts with pictures and those look like M300s, not M275s. When I get a little time I want to go back and reread the whole thread and summarize it. My conclusion is that MY23 6.7 Tremors got a SRW version of the Dana M300. And only MY23 Diesels. MY22 and earlier got M275 and MY24 got Sterling 11.6".

 

[Mister Bevilaqua]

Yes. I went back and looked at some of the earlier posts with pictures and those look like M300s, not M275s. When I get a little time I want to go back and reread the whole thread and summarize it. My conclusion is that MY23 6.7 Tremors got a SRW version of the Dana M300. And only MY23 Diesels. MY22 and earlier got M275 and MY24 got Sterling 11.6".

If true that would be great news and it would help those looking to get diff covers on these trucks as well. A pic of mine from when it was new and clean lol. 2023 F-250 Tremor 6.7L HO diesel.

 

[shermanator2]

If true that would be great news and it would help those looking to get diff covers on these trucks as well. A pic of mine from when it was new and clean lol. 2023 F-250 Tremor 6.7L HO diesel.

Great picture. Notice the notches in each side of the cover and the sort of wave like step above the fill cover. This matches 04sshd's post #205 where he states that a M275 cover does not fit. Compare this to Gunner77's post #203 which is a MY21 which is well known to have a M275 and has no notches on the sides and no wave step above the fill plug. Also compare these to the link that I sent in post #207 that shows the two different covers. From this I conclude that you and 04sshd have M300 rear differentials.

This is good and bad news. I think that the M300 is a great differential and strong enough to be used in applications up to the F-650 I think. I wish my Tremor had one. The bad news is that there is not much aftermarket support for it and since it was one year only in the SRW application there probably will not be.

As a side note" on my MY22 F-350 DRW (presumably a M300) the notches in the sides of the cover accommodate a roughly 1/4" diameter tube connection on each side. I am not sure what this is for. I will have to research this but maybe it is for active circulation to the bearings for better cooling. I have the 4.10 gearing so the very heavy trailer rating.

 

[Mister Bevilaqua]

I personally don't care about putting a different diff cover on but if it does indeed have the M300 then that's a plus in my book as it's a stronger axle.

 

[midohioboarder]

My F25 Tremor 7.3. From what everyone is saying, this is a Sterling 11.6, correct? Anyone know of a good gasket for this? Anyone have any pros/cons of putting some Tungsten Disulfide in this differential?

 

[shermanator2]

My F25 Tremor 7.3. From what everyone is saying, this is a Sterling 11.6, correct? Anyone know of a good gasket for this? Anyone have any pros/cons of putting some Tungsten Disulfide in this differential?

Yes, that is a Sterling 11.6". I know nothing about gaskets for it nor Tungsten Disulfide.

 

[STDevil]

Getting back to the M275 vs. M300, here is a picture of the rear differential in my 2022 F-350 standard cab dually 6.7 with 4.10 limited slip. Presumably this is a Dana M300. The parallax makes it a little hard to see, but it measures about 13" from top to bottom cover bolts. The axle tubes measure 4.5" OD. The aluminum cover is factory.View attachment 125979
I know that the shape of the cover looks very similar to the Dana used in Tremors, but I suspect that it is significantly larger. It would be nice if someone with a 2023 Dana axled Tremor could make a measurement from top to bottom cover bolts to compare with this.

And as a side note, we are still looking for anyone with a 6.7 Tremor that has a 16 bolt Sterling 11.6 axle, or a 2023 7.3 Tremor with a 14 bolt Dana axle.

What are those tubes that seem to be going into the axle housing on each side of the diff cover??

 

[shermanator2]

What are those tubes that seem to be going into the axle housing on each side of the diff cover??

I don't know yet. Next time I am under there I will try to trace them and see what I can figure out.

 

[carsonsmith87]

Just out of my own curiosity, does anyone know what the white chalk numbers mean that are on the diff covers from the factory. in all the pictures some have the marks, some don't, all the numbers appear to be different. Was just curious as to what it may mean or correspond to.

 

[STDevil]

I don't know yet. Next time I am under there I will try to trace them and see what I can figure out.

Thank you - I can't imagine why the little tubes would need to run into the axle housing...maybe they are there to squire oil on the bearings but that does not make sense since they're already partially immersed...

 

[MTUcrash]

Thank you - I can't imagine why the little tubes would need to run into the axle housing...maybe they are there to squire oil on the bearings but that does not make sense since they're already partially immersed...

Those are the brake lines. They don’t go into the housing, just into distribution blocks that are mounted on plates that are welded to the axle housing.
—— disregard, just noticed that you were referring to a different image than I thought.

 

[StrokinOut]

Thank you - I can't imagine why the little tubes would need to run into the axle housing...maybe they are there to squire oil on the bearings but that does not make sense since they're already partially immersed...

I was under the impression that they are ABS sensors. At least that's what I recall from past reading.