I’ve had a tranny rebuilt on a 1994 Merc Sable. Car was smooyh and quit before it went into shop, now car is noisy after tranny was done. Mechenic says it’s the manifold exsaust which he didn’t touch to pull out and put back tranny. I believe he had to miss connecting something correctly. What do you think?
You need to give a better description of the noise. There are all sorts of things that can make noise. If it is engine noise also pop the hood and try to figure out where its coming from.
And on a 15yr old car it wouldn’t surprise me at all if you did have some completely independent issue with the exhaust system.
Maybe he should have disconnected it to avoid damaging it, maybe not. He can still fix it if the customer will pay him.