im new to this forum and in need of some help. I have a 68 crew cab power wagon. 318 with 435 4spd. I drove it to Chryslers at Carlisle and developed a vibration that eventually broke my input shaft at the transfer case. I have since put another transfer and trans and clutch out of another donor power wagon and still have the vibration. I am sending the short driveshaft out to be balanced.the replacement parts are the same as originals.any one know of an issue with the transfer cases or do I have another issue. any help would be appreciated.