(Question) Differential / Transfer Case Fluid Change

[Jl335i]

Long Story Short, I'm getting a new transmission under warranty.
That Jeep dealership called me that they needed to do a Differential/transfer case fluid change. The service would cost me $700

So I said no, I'll go somewhere else

But in all seriousness. The JL has 3 spots for the change (Front Diff / Rear Diff & Transfer Case)
If I were to get a new Transmission wouldn't they put in new oil into the transfer case no matter what?

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[Sheepjeep]

there would be no need to change any of those fluids outside of general maintenance for a new transmission. The diffs are no where near the transfercase, older jeeps that had slip yokes for the rear output meant the rear driveshaft was a sealing surface for the transfercase but on the JL it is fixed yokes. The transfercase is a sealed unit its input is most likely a sealing surface for the output of the transmission. So when you remove the trasfercase fluid will come out of the transmission.

If they say they need to do this work because of the warranty work requires it then it is covered by the warranty not you