Here is my advice and I have fixed many of these. First double check all the joints. Recommend dropping the shafts and checking all the caps. If a joint is seized it can cause a problem. Once the joints are checked and ok you need to be sure the shafts are phased. If that is ok you will have to most likely twist the transfer case crossmember to correct the short jack shaft angle between the transmission and transfer case. If you can get good pictures I can try to direct you on what to do. Like I said I have done many.