ive been trying to research this for a while wonder what are your guys experience . I've never changed / touched anything transmission related on my 2020 spark and its still running strong at a 120k miles (bought it at 45k miles in jan 2023). I've always done all my oil changes and filter changes myself regularly and spark plugs/brakes but ive heard/read it is supposed to be serviced every 30-60k miles and if its still going long after that to just leave it alone? i called a few places including the chevy dealer and they all said to leave it but im assuming its for them not to be liable if anything happens. Just wondering as i would like to keep my spark going another 20k miles before trading in for a new car. Right now runs perfectly fine but just wondering