03 to early 04 Transfer Case
 

I managed to break my front drive line for the 4x4 and had it replaced but since then it has made a funny thumping noise going from reverse to drive and visa versa but only at really low speeds. After it gets moving I dont hear it anymore. I think something may be wrong with it and if it is I was wondering if anyone has a spare one they would be willing to sell me because from what I can tell they can be expensive and I dont want to drop the money on a brand new one. Thanks!