4wd wasn’t engaging tonight so I drained the fluid from the hubs which was low and pretty black. Shot some brake clean in spun and drained. Filled with synthetic atf sealed and spun- drained and refilled to appropriate level and works like a charm. I realize probably not the best way to clean and wonder if brake cleaner is bad for the seals but it dries pretty quick. Good quick fix worked and will do a thorough clean out after the snow melts.

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