About a year ago, I bought a 2013 SV with 134k miles for my teen to drive around town. The maintenance records were sparse so we’ve been steadily bringing it up to speed. We’ve had the sway bar links replaced and fixed the brakes, and it’s a big improvement already. The car has definite transmission problems, however - the engine squeals and sounds like it’s spinning if it’s cold or if you push too hard on the gas from a stop - and I thought that changing the transmission fluid would potentially help. However when I took it to a mechanic, he said it’s a sealed transmission system and that you don’t need to change the fluid. I know very little about cars, so can someone tell me if this is true? I can’t find clear information in the owners manual.