I have seen this problem before, if the transfer case pops under acceleration means the chain is stretched and jumping the internal transfer case chain gears, here is a diagram below to show you what I am talking about. Also, it would help if you could take a video of the noise and unload it here with your response. Replace #10, 12 and #7.
Check out the diagrams (below). Let us know what happens and please upload pictures or videos of the problem.
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Wednesday, April 27th, 2022 AT 3:34 PM