Nassif

Hi guy, I would like share that I buyed a used 2008 CTS in Nov 2015 with 95K kms on meter. Several week after I found a vibration and felt it like a problem somewhere in the suspension. I was not sure it about it, but the same happen with my old car Escalade 2007. Well I took it the same garage that I used to take my car. They told me that there is some problem in the front differential/transfer case so they replace that first. But after replacing it the problem was still there. When I took my vehicle and came back it has the same noise. I took back my car to dealer and inform him about the same, but now this time they said another story which says output shaft coming from the transmission and the input shaft to the transfer case had been stripped. Well it was hardly understandable to me. I smell something that lead me to think that they are unnecessary trying to get whole lot of money in replacing the part from my pocket, I bring my vehicle back honestly don’t want to pay for lazy and unwanted repair anymore. What you guy think, Should I place ad for selling the car and buy new one this time? Or is there any quick solution that I can give to the dealer to repair my car without a hassle and in small amount?