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Is there a gasket needed for this cover, and if so, do you sell them?
Yes, a gasket or a bead of RTV silicone sealant is required to seal the cover against the differential housing and prevent gear oil leaks. The individual replacement gasket for the Dana 44 AdvanTEK differential cover on the JL and JT is Spicer part # 10040476.
i have a 2024 rubicon 392 final edition can i reuse the OEM diff gasket
Yes, you can definitely reuse the OEM rubber/beaded Mopar differential gasket on your 2024 Rubicon 392 Final Edition as long as it's still in good condition with no tears, cracking, or flattening.

When you install your new Dana Spicer Dana 44 Differential Cover, just wipe the gasket clean and make sure the sealing surfaces on both the axle housing and the new cover are spotless before bolting it back up.
Hello, Will the Blue cover fit both the front and rear 2024 rubicon 4xe?
Yes, these are for both front and rear Dana 44's.
Do you have these in the raw material that can be custom painted, it's a new option from Dana. 23 JL Rubicon.
We do not have them at this time. Sorry for the inconvenience.
This cover fits my gladiator overland 2021 if i have 4:88 ratio and arb locker?
Yes, this will fit your Jeep's Dana 44 axle.
Does this fits? if i have an aftermarket ARB lockers?
Yes, this will fit. It is specific for Dana 44 axles, however. Depending on what trim package you have or if you've done axle swaps, you may not have Dana 44's on both axles. Please verify what's on your Jeep.
Will these fit any trim level of 2020 gladiator ? Or only specific models with certain axles?
These fit all Gladiator JT models. Thanks for your inquiry.
Is there already a factory front differential cover installed (on the Overland)? If so, how does this differ from what is already provided by the factory protection?
The covers that are sold on production axles are made of stamped steel, these are cast from nodular iron. The casting process can make more intricate designs like the facial ribs that provide greater strength and more sliding protection. OE covers can be bent and crushed on the trail which can ruin other internal components...more costly to fix. This cover made from iron, would crack under the same loads, saving the internals.
2019 JLUR -- what is the new capacity of the front and rear diff's with these new covers?
The capacities are unchanged with these new covers.
Two questions. Why does this cover have two fill holes? If I have a 2.5” lift which fill hole would I use? Also looks like it comes with RTV. The JL has a permanent gasket. I assume that can be used in place of the RTV? Thanks
The lower hole is for stock fluid capacity and the top hole is for increased fluid for heavy off-roading. You can reuse the original gasket if it is in good shape otherwise they provide RTV sealant.