Transfer Case Info. Please >>

[Hummerguy32]

I had the problem listed in this forum concerning my transfer case having gear oil in it instead of transmission fluid. The mechanic flushed it out three times and it seems the 4wd lock position is kinda working itself out though he isn't so optomistic it will completely work itself back to normal.

First any suggestions on what else I kind do before opeing up the transfer case to see what the problem is?

Second how much is a transfer case? Can I just get the piece that may be worn in there or do I have to get the whole thing?

Third = I'm an idiot I know please any suggestions would be greatly appreciated