I am 63 years old and I retired last year, so I live on a small monthly pension now. My 2014 GMC Terrain is the only car I have, and I use it to visit my doctor, buy groceries and see my grandchildren on weekends. Two weeks ago it started to slip when I drove up the ramp near my house. The engine got loud, but the car did not speed up. Then on Monday it would not move at all, and my neighbour helped me push it to the side of the road. The garage I always used said the gearbox is finished and I need a new one. When he told me the price, I had to sit down. It was more than I have saved for the whole year. My nephew said not to give up yet and told me to ask about an affordable GMC automatic gearbox replacement in Industrial Area 11, because he said some places have different choices that cost less than the big dealers. I did not know there were different choices. I read a page about GMC gearbox repair online to understand the words, and it talked about rebuilt units, used units and checking if the problem is small or big. It was easy to read, but I still do not know what is best for me. So I want to ask people who know more. If the gearbox is really finished, which is the better choice, a used one, a rebuilt one, or fixing the old one? How long does each one last, and does it come with a warranty? How can I know a cheap used gearbox is not already tired? Can I pay in two or three parts, or do most places want all the money at once? The car has 160,000 kilometers, so I am also thinking about whether it is smarter to sell it and buy a smaller car. How did you decide when you were in the same place? Sorry for the long message, and thank you for reading.