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Differential covers

Chris1911

Chris1911

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What are my choices for a differential cover with a drain plug? Seems like every site i search on gives me different sizes and for different vehicles. Some say universal. What size do i need? This is for a 2019 with 6.4.
 
PML is a Very nice cover. There is a couple of finishes to choose from. Reasonably priced. 11.5" axle rear 9.25 front. Check out their Website. You can message them for Verification.

  • AAM 11.5 14 Bolt For Ram 2500 2014 to 2018​


    Part Number 11147 ​


  • AAM Front 9.25 12 Bolt For Ram
    Part Number 11136​

AAM 12.0 For Ram
Part Number 11176​

 
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While there are different size rear ring gears for 19+ trucks they all use the same diff cover. Make sure it’s for 11.5/12.0” diffs, and not for 11.5/11.8” ones.

PML would get my vote for a cost effective cover with a drain.

Personally I like to look at the gears when I service them, so pulling the cover isn’t a big deal.
 
AH64ID said:
While there are different size rear ring gears for 19+ trucks they all use the same diff cover. Make sure it’s for 11.5/12.0” diffs, and not for 11.5/11.8” ones.

PML would get my vote for a cost effective cover with a drain.

Personally I like to look at the gears when I service them, so pulling the cover isn’t a big deal.
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I agree. Pulling the cover also let’s you clean the inside of the diff out.
 
AH64ID said:
While there are different size rear ring gears for 19+ trucks they all use the same diff cover. Make sure it’s for 11.5/12.0” diffs, and not for 11.5/11.8” ones.

PML would get my vote for a cost effective cover with a drain.

Personally I like to look at the gears when I service them, so pulling the cover isn’t a big deal.
Click to expand...

I suppose it is a good idea to actually see what's going on while doing it. And it's not like it's done often.
 
I keep thinking about going and changing my diff fluid as I have close to 30,000 miles on it and I have a case of diff fluid but I can't bring myself to stinking up my garage this time of year.....
 
I've had both the PML and the AEV covers. The PML ain't a bad cover. Has some beefiness to it. That being said, the AEV is cast iron and heaven forbid you catch a rock or a stump with a cover, you can feel pretty good about it not breaking.

Sent from my SM-G975U using Tapatalk
 
After seeing the Banks Series on these covers. I think factory or the Banks is really the only way to go..
 
22BlackBigHorn said:
After seeing the Banks Series on these covers. I think factory or the Banks is really the only way to go..
Click to expand...
the AEV follows the exact internal contour of the factory cover. the inside of the AEV is identical to the inside of the factory.
 
Quick/dumb question - is everyone only swapping out the rear diff cover or doing both front and rear??
 
I have changed the rear for a banks. I want to change the front for an AEV but need some spare cash. For now OEM on the front banks in the rear.


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I'm looking for a stock diff cover for a 21 dually, anyone have one laying around, looking to buy it
 
Besides ease of fluid changes and looks is there a lower lube temp benefit to changing the covers?
 
MrSteve said:
Besides ease of fluid changes and looks is there a lower lube temp benefit to changing the covers?
Click to expand...

You will likely see a lower temp, but whether or not that's a benefit depends on how you use the truck.

Years ago I spoke with an AAM engineer who stated we didn't even need to run 75w-140 unless we were running at or above GCWR thru Death Valley. That was back when the HO had 610 lb/ft and a much lower GCWR. Regardless, the axle is designed to be used as equipped up thru GCWR (which does include 75w-140 on the DRW HO's now).

I've ran a diff cover with extra cooling and extra lube capacity and the biggest thing I noticed from it was decreased fuel economy when the fluid was cold, and the fluid took a LOT of miles to warm up.

So it really does depend on use. If your loaded up to GCWR all the time, live somewhere hotter than average, and run hard then you may benefit from a potential decrease in lube temps. If you don't, then you need to analyze how you use your truck, as it's the most efficient when everything is at operating temp.

These days I just run a high quality gear lube and call it good.
 
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