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Message: <blockquote data-quote="stutaeng" data-source="post: 22540" data-attributes="member: 6175">My 04 project suburban 2500 has the same transfer case and it was filled with red ATF fluid as well. When I bought it the 4x4 didn't work but it was the shift encoder reductor wheel. I fixed that and it seems to work now.A few months ago I replaced the fluid and that's when I discovered it had ATF. No chunks or debris were in the old fluid, so I refilled it with blue fluid and sent it.Welcome from Texas BTW!</blockquote>