transfercase problem

[BlueHUMMERH2]

I think the t-case shifting hard is common. The bangs.... I never had a transfer case go bad yet, but I imagine it would be more of a grind, clunk, boom as stuff sheared off and it chewed itself to pieces. Is it more of a clunk? That might be in your transmission. It could also be a misfire in the engine if you've got a gasser (maybe on a diesel too, I don't know).

I'm sure someone else will speak up.