Hello. I’m gonna start this by saying I know absolutely nothing about cars. I own a 2012 Nissan Altima 2.5 S with 154,000 miles.  Engine is a 2.5 L 4 cylinder and it has a cvt transmission. I’ve had it for 2 years now and never really had a problem with it until now. I don’t know of any maintenance it has had before I bought it. About 2 months ago, my car broke down and I took it to a mechanic I really trust. He replaced some spark plugs and an ignition coil but he also told me my transmission was going out. I couldn’t understand what he was saying because, quite frankly, I didn’t know what he was talking about. But I know he said something about solenoids. He also said Nissan’s cvt transmissions usually give out around 100,000 to 150,000 miles. And the mechanic said I should go ahead and trade it in while it’s still running because cvt transmissions cost the same if not more to fix than to replace. Which would be $6,000. That’s more than I paid to buy the car. Since I’ve had the car, I noticed that every now and then when I would stop at a red light and I was idling, the car would shudder/vibrate. And when I looked it up I kept seeing stuff for transmission. But I figured that it would be a later problem so I didn’t do anything about it. After I got my car back from the mechanic, I noticed it would jerk sometimes and it never did that before. I kept driving it for about a month and then it was having a hard time accelerating up hills. Now, there’s some resistance in accelerating in general. It’s not slipping gears or anything, but it’s obviously being a little funky. I tried to trade it in at a dealership, try to get loans, and all that good stuff but ultimately couldn’t go through with that because of money and credit. So I asked around to some friends that really know cars. One of them has worked on cars since he was a kid. He has driven it and checked out the transmission and he says it’s fine. I just need to change my transmission fluid or get a trans flush. I replaced my transmission fluid about a year ago, so I don’t know if that’ll help. I’ve asked multiple people that know cars better than I do and they’ve all said my transmission should be fine but I can’t help but think my transmission is failing. I’m in a tough spot financially, so I’m really hoping it just needs maintenance. But, if the transmission is failing I would like to know before it just completely gives out on me. Also, I don’t know if this is necessary, but I hit a deer 3 weeks ago and my radiator cracked a little. It hasn’t been leaking fluid or anything, but I know that could be a problem at least in the future. I also haven’t gotten an oil change since all of this has happened ( about 3-4 months), but I don’t know if that has any relevance. Honestly, My car is a beater at this point and I plan on getting rid of it eventually, but right now is not the best time. Thank you for your help!