rear differential fluid

[llm.flyfisher]

How much does a stock rear differential need to fill on a change? I did my first engine oil change and ended up using a little over 6 quarts. I will have to order or go buy local some rear diff fluid as I don't have any so wondering how much and will 75w-90 work OK? I have the electronic locking rear differential with stock cover. How much would an accessory diff cover require? I am not sure it is even necessary to change out the rear differential fluid with only 5k miles on the truck, but figured it might be a good idea to do before a trip to Florida to get my new poling skiff. Is there typically a lot of metal in the oil from break-in and gears (ring-pinion) wearing in surfaces?

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[Radioman]

How much does a stock rear differential need to fill on a change? I did my first engine oil change and ended up using a little over 6 quarts. I will have to order or go buy local some rear diff fluid as I don't have any so wondering how much and will 75w-90 work OK? I have the electronic locking rear differential with stock cover. How much would an accessory diff cover require? I am not sure it is even necessary to change out the rear differential fluid with only 5k miles on the truck, but figured it might be a good idea to do before a trip to Florida to get my new poling skiff. Is there typically a lot of metal in the oil from break-in and gears (ring-pinion) wearing in surfaces?

The owner's manual for the 2019 model year states 80W-90 fluid and 3.04 pints for a locking axle. I think 75W-90 would work but for my own truck, I would use what Ford recommends. I also think 5k is a bit soon to change the fluid but it wouldn't hurt anything other than your wallet.

 

[Rp930]

The owner's manual for the 2019 model year states 80W-90 fluid and 3.04 pints for a locking axle. I think 75W-90 would work but for my own truck, I would use what Ford recommends. I also think 5k is a bit soon to change the fluid but it wouldn't hurt anything other than your wallet.

It’s a good question. When you change a ring and pinion most manufacturers say change in 500 miles. In a new truck, no. Maybe they run the ring and pinion in? I doubt it.

 

[llm.flyfisher]

OK I may just leave it alone and drive it for 20k miles and then change it as part of the 4th oil change. Thanks guys.

 

[HenryMac]

How much does a stock rear differential need to fill on a change? I did my first engine oil change and ended up using a little over 6 quarts. I will have to order or go buy local some rear diff fluid as I don't have any so wondering how much and will 75w-90 work OK? I have the electronic locking rear differential with stock cover. How much would an accessory diff cover require? I am not sure it is even necessary to change out the rear differential fluid with only 5k miles on the truck, but figured it might be a good idea to do before a trip to Florida to get my new poling skiff. Is there typically a lot of metal in the oil from break-in and gears (ring-pinion) wearing in surfaces?

Owners Manual Page 319...

 

[llm.flyfisher]

I don't have an owners manual in my truck I discovered. They did a dealer trade and I guess they forgot to put the owners manual in the glove box. So I need to get over to the stealership and get them to order me a manual. Thanks for posting up the fluid capacities.

 

[HenryMac]

I don't have an owners manual in my truck I discovered. They did a dealer trade and I guess they forgot to put the owners manual in the glove box. So I need to get over to the stealership and get them to order me a manual. Thanks for posting up the fluid capacities.

You've got one now......

https://www.fordservicecontent.com/...-Owners-Manual-version-1_om_EN-US_10_2018.pdf

 

[llm.flyfisher]

Well do tell! Thanks very much!

 

[Radioman]

There is now a updated version available now for the 2019 model:

http://www.fordservicecontent.com/F...wners-Manual-version-4_om_EN-US_06_2019-1.pdf

 

[Racket]

I figured I'd give this thread a bump; I haven't had a truck in some time, and this is the first new one for me.

I see synthetic differential oil is available now and wonder if it provides wear benefits - or shock protection for the gears - or heat dissipation for heavy duty/extended driving?

I see the AFE replacement differential cover adds an additional quart of oil capacity which in my mind would scream for synthetic as it reaches operating viscosity quickest.

 

[Frenchy]

I figured I'd give this thread a bump; I haven't had a truck in some time, and this is the first new one for me.

I see synthetic differential oil is available now and wonder if it provides wear benefits - or shock protection for the gears - or heat dissipation for heavy duty/extended driving?

I see the AFE replacement differential cover adds an additional quart of oil capacity which in my mind would scream for synthetic as it reaches operating viscosity quickest.

First off do yourself a favor and DO NOT get the AFE diff cover. Yes it adds capacity but disrupts the engineered fluid flow and will increase wear on the bearings.

For synthetic oil you shpuld be good to use it as it really helps with heat dissipation vs conventional oil. Will it help with shock load? Can't say. Will it help with MPG? Most likely but I wouldn't expect too much.

Hope this helps

 

[Racket]

After finding and posting here, I found this thread with the YouTube video that has some extensive explanation.
https://www.ranger5g.com/forum/threads/rear-diff-covers-now-available.2469/

All I can say now is perhaps some type of windage tray for the AFE might make it more viable. Or wait on Banks Engineering:


Credit to sister/cousin(?) site Ranger Station too: https://www.therangerstation.com/ranger-tech/dana-advantek-axles-ford-ranger/

 

[Frenchy]

After finding and posting here, I found this thread with the YouTube video that has some extensive explanation.
https://www.ranger5g.com/forum/threads/rear-diff-covers-now-available.2469/

All I can say now is perhaps some type of windage tray for the AFE might make it more viable. Or wait on Banks Engineering:


Credit to sister/cousin(?) site Ranger Station too: https://www.therangerstation.com/ranger-tech/dana-advantek-axles-ford-ranger/

If going Offroad I would keep the factory cover or get the ARB or Ford Performance cover. Both will not disrupt fluid flow as mentioned in the video. If you are not going offroad then the Banks cover is a great idea.

Why do I say this? Well the cooling ducts are put there in an easy place to get hit Offroad.

Hope this helps

 

[Racket]

If going Offroad I would keep the factory cover or get the ARB or Ford Performance cover. Both will not disrupt fluid flow as mentioned in the video. If you are not going offroad then the Banks cover is a great idea.

Why do I say this? Well the cooling ducts are put there in an easy place to get hit Offroad.

Hope this helps

I would think the Ford part would be superior but there is a shelf cast into it that looks like it will affect lubricant motion at highway speeds. The ARB does look like a rugged and properly designed unit but I don't anticipate a lot of cooling for highway/towing use. Synthetic absolutely seems like a necessity either way. Here's a forum member (@j0shm1lls ) swapping his, you can see the inside casting.



A $200 strong cast cover for the rear (i didn't price a front for 4x4s) or a potentially (if Banks comes out with one) $400 rear for towing or continuous high speed use looks like the price difference.

The return on these 'investments ' is subjective as always.

 

[Frenchy]

I would think the Ford part would be superior but there is a shelf cast into it that looks like it will affect lubricant motion at highway speeds. The ARB does look like a rugged and properly designed unit but I don't anticipate a lot of cooling for highway/towing use. Synthetic absolutely seems like a necessity either way. Here's a forum member swapping his, you can see the inside casting.



A $200 strong cast cover for the rear (i didn't price a front for 4x4s) or a potentially (if Banks comes out with one) $400 rear for towing or continuous high speed use looks like the price difference.

The return on these 'investments ' is subjective as always.

Now that I have seen this I see what you mean. Unfortunately I haven't seen a picture of this before and I can see some problems with that as well. As for the front diff there is no cover due to the case design. My suggestion is just change the fluid to full synthetic and when Banks releases thier cover consider going with it.

Now I should ask, do you tow with your truck? Also what is the most you have done for long distance road trips with your truck?

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