Service rear diff ?

[Granite Willys]

Im thinking about servicing the rear LSD diff on my 2021 Willy's. I have about 20k on it so far. Does anyone know if the gasket is re-useable or is it RTV. also would Valvoline full synthetic 75W90 with Lsd additive already inside be appropriate ?

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[Rhinebeck01]

Im thinking about servicing the rear LSD diff on my 2021 Willy's. I have about 20k on it so far. Does anyone know if the gasket is re-useable or is it RTV. also would Valvoline full synthetic 75W90 with Lsd additive already inside be appropriate ?

@Granite Willys

Read this thread from start to finish:
https://www.jlwranglerforums.com/forum/threads/differential-oil-change.47318/